Hi Nils! 

I'm using Odoo 15 CE. tried to reload the modules but still the same.

Here is the logs. Could you help ?

  result = ir_http._dispatch()
File: "/usr/lib/python3/dist-packages/odoo/addons/auth_signup/models/ir_http.py", line 19, in _dispatch
  return super(Http, cls)._dispatch()
File: "/usr/lib/python3/dist-packages/odoo/addons/web_editor/models/ir_http.py", line 21, in _dispatch
  return super(IrHttp, cls)._dispatch()
File: "/usr/lib/python3/dist-packages/odoo/addons/utm/models/ir_http.py", line 29, in _dispatch
  response = super(IrHttp, cls)._dispatch()
File: "/usr/lib/python3/dist-packages/odoo/addons/http_routing/models/ir_http.py", line 519, in _dispatch
  result = super(IrHttp, cls)._dispatch()
File: "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_http.py", line 237, in _dispatch
  result = request.dispatch()
File: "/usr/lib/python3/dist-packages/odoo/http.py", line 815, in dispatch
  r = self._call_function(**self.params)
File: "/usr/lib/python3/dist-packages/odoo/http.py", line 368, in _call_function
  return checked_call(self.db, *args, **kwargs)
File: "/usr/lib/python3/dist-packages/odoo/service/model.py", line 94, in wrapper
  return f(dbname, *args, **kwargs)
File: "/usr/lib/python3/dist-packages/odoo/http.py", line 357, in checked_call
  result = self.endpoint(*a, **kw)
File: "/usr/lib/python3/dist-packages/odoo/http.py", line 921, in __call__
  return self.method(*args, **kw)
File: "/usr/lib/python3/dist-packages/odoo/http.py", line 546, in response_wrap
  response = f(*args, **kw)
File: "/usr/lib/python3/dist-packages/odoo/addons/web/controllers/main.py", line 2000, in report_download
  response = self.report_routes(reportname, docids=docids, converter=converter, context=context)
File: "/usr/lib/python3/dist-packages/odoo/http.py", line 546, in response_wrap
  response = f(*args, **kw)
File: "/usr/lib/python3/dist-packages/odoo/addons/web/controllers/main.py", line 1929, in report_routes
  pdf = report.with_context(context)._render_qweb_pdf(docids, data=data)[0]
File: "/usr/lib/python3/dist-packages/odoo/addons/account/models/ir_actions_report.py", line 50, in _render_qweb_pdf
  return super()._render_qweb_pdf(res_ids=res_ids, data=data)
File: "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_actions_report.py", line 909, in _render_qweb_pdf
  pdf_content = self._run_wkhtmltopdf(
File: "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_actions_report.py", line 488, in _run_wkhtmltopdf
  out, err = process.communicate()
File: "/usr/lib/python3.9/subprocess.py", line 1134, in communicate
  stdout, stderr = self._communicate(input, endtime, timeout)
File: "/usr/lib/python3.9/subprocess.py", line 1981, in _communicate
  ready = selector.select(timeout)
File: "/usr/lib/python3.9/selectors.py", line 416, in select
  fd_event_list = self._selector.poll(timeout) 
2023-07-18 06:53:22,846 1 INFO ? odoo.service.server: Initiating server reload 
2023-07-18 06:53:23,122 1 INFO ? odoo.sql_db: ConnectionPool(used=0/count=0/max=64): Closed 9 connections  
2023-07-18 06:53:23,730 1 INFO ? odoo: Odoo version 15.0-20230530 
2023-07-18 06:53:23,731 1 INFO ? odoo: Using configuration file at /etc/odoo/odoo.conf 
2023-07-18 06:53:23,731 1 INFO ? odoo: addons paths: ['/usr/lib/python3/dist-packages/odoo/addons', '/var/lib/odoo/addons/15.0', '/mnt/extra-addons'] 
2023-07-18 06:53:23,731 1 INFO ? odoo: database: odoo@172.17.0.5:5432 
2023-07-18 06:53:23,871 1 INFO ? odoo.addons.base.models.ir_actions_report: Will use the Wkhtmltopdf binary at /usr/local/bin/wkhtmltopdf 
2023-07-18 06:53:24,045 1 INFO ? odoo.service.server: HTTP service (werkzeug) running on 7670bb9481ba:8069 
2023-07-18 06:53:26,761 1 INFO ? odoo.http: HTTP Configuring static files 
2023-07-18 06:53:26,778 1 INFO alnshop odoo.modules.loading: loading 1 modules... 
2023-07-18 06:53:26,791 1 INFO alnshop odoo.modules.loading: 1 modules loaded in 0.01s, 0 queries (+0 extra) 
2023-07-18 06:53:26,847 1 INFO alnshop odoo.modules.loading: loading 157 modules... 
2023-07-18 06:53:27,723 1 WARNING alnshop odoo.models: The model pos.report has no _description 
2023-07-18 06:53:27,724 1 WARNING alnshop odoo.models: The model report.pos_report_generator.pos_order_report has no _description 
2023-07-18 06:53:27,828 1 WARNING alnshop odoo.models: The model sale.report.advance has no _description 
2023-07-18 06:53:27,829 1 WARNING alnshop odoo.models: The model sale.report.invoice has no _description 
2023-07-18 06:53:27,829 1 WARNING alnshop odoo.models: The model sale.report.category has no _description 
2023-07-18 06:53:27,829 1 WARNING alnshop odoo.models: The model sale.report.indent has no _description 
2023-07-18 06:53:27,830 1 WARNING alnshop odoo.models: The model sale.report.analysis has no _description 
2023-07-18 06:53:27,830 1 WARNING alnshop odoo.models: The model sale.report.weekly has no _description 
2023-07-18 06:53:27,837 1 WARNING alnshop odoo.models: The model sales.report has no _description 
2023-07-18 06:53:27,838 1 WARNING alnshop odoo.models: The model report.sale_report_generator.sale_order_report has no _description 
2023-07-18 06:53:27,851 1 WARNING alnshop odoo.models: The model report.advanced_pos_reports.report_pos_posted_session has no _description 
2023-07-18 06:53:27,852 1 WARNING alnshop odoo.models: The model report.advanced_pos_reports.report_pos_ongoing_session has no _description 
2023-07-18 06:53:27,852 1 WARNING alnshop odoo.models: The model report.advanced_pos_reports.report_pos_top_selling_products has no _description 
2023-07-18 06:53:27,853 1 WARNING alnshop odoo.models: The model report.advanced_pos_reports.report_pos_top_selling_categories has no _description 
2023-07-18 06:53:27,853 1 WARNING alnshop odoo.models: The model report.advanced_pos_reports.report_pos_top_selling_customers has no _description 
2023-07-18 06:53:27,859 1 WARNING alnshop odoo.addons.base.models.decimal_precision: Deprecated call to decimal_precision.get_precision(), use digits= instead 
2023-07-18 06:53:27,859 1 WARNING alnshop odoo.addons.base.models.decimal_precision: Deprecated call to decimal_precision.get_precision(), use digits= instead 
2023-07-18 06:53:27,885 1 INFO alnshop odoo.modules.loading: 157 modules loaded in 1.04s, 0 queries (+0 extra) 
2023-07-18 06:53:28,047 1 WARNING alnshop odoo.fields: sale.order.state: selection=[('draft', 'Quotation'), ('sent', 'Quotation Sent'), ('waiting', 'Waiting Approval'), ('sale', 'Sales Order'), ('done', 'Locked'), ('cancel', 'Cancelled')] overrides existing selection; use selection_add instead 
2023-07-18 06:53:28,087 1 WARNING alnshop odoo.fields: Field account.move.amount_discount: unknown parameter 'track_visibility', if this is an actual parameter you may want to override the method _valid_field_parameter on the relevant model in order to allow it 
2023-07-18 06:53:28,105 1 WARNING alnshop odoo.fields: Field budget.budget.state: unknown parameter 'track_visibility', if this is an actual parameter you may want to override the method _valid_field_parameter on the relevant model in order to allow it 
2023-07-18 06:53:28,113 1 WARNING alnshop odoo.fields: Field pos.order.line.returned_qty: unknown parameter 'digits', if this is an actual parameter you may want to override the method _valid_field_parameter on the relevant model in order to allow it 
2023-07-18 06:53:28,114 1 WARNING alnshop odoo.fields: Field sale.order.state: unknown parameter 'track_visibility', if this is an actual parameter you may want to override the method _valid_field_parameter on the relevant model in order to allow it 
2023-07-18 06:53:28,115 1 WARNING alnshop odoo.fields: Field sale.order.amount_untaxed: unknown parameter 'track_visibility', if this is an actual parameter you may want to override the method _valid_field_parameter on the relevant model in order to allow it 
2023-07-18 06:53:28,115 1 WARNING alnshop odoo.fields: Field sale.order.amount_tax: unknown parameter 'track_visibility', if this is an actual parameter you may want to override the method _valid_field_parameter on the relevant model in order to allow it 
2023-07-18 06:53:28,115 1 WARNING alnshop odoo.fields: Field sale.order.amount_total: unknown parameter 'track_visibility', if this is an actual parameter you may want to override the method _valid_field_parameter on the relevant model in order to allow it 
2023-07-18 06:53:28,116 1 WARNING alnshop odoo.fields: Field sale.order.amount_discount: unknown parameter 'digits', if this is an actual parameter you may want to override the method _valid_field_parameter on the relevant model in order to allow it 
2023-07-18 06:53:28,116 1 WARNING alnshop odoo.fields: Field sale.order.amount_discount: unknown parameter 'track_visibility', if this is an actual parameter you may want to override the method _valid_field_parameter on the relevant model in order to allow it 
2023-07-18 06:53:28,119 1 WARNING alnshop odoo.fields: Field sale.report.advance.type: unknown parameter 'reqired', if this is an actual parameter you may want to override the method _valid_field_parameter on the relevant model in order to allow it 
2023-07-18 06:53:28,120 1 WARNING alnshop odoo.fields: Field sale.report.invoice.status: unknown parameter 'reqired', if this is an actual parameter you may want to override the method _valid_field_parameter on the relevant model in order to allow it 
2023-07-18 06:53:28,120 1 WARNING alnshop odoo.fields: Field sale.report.indent.status: unknown parameter 'reqired', if this is an actual parameter you may want to override the method _valid_field_parameter on the relevant model in order to allow it 
2023-07-18 06:53:28,121 1 WARNING alnshop odoo.fields: Field sale.report.analysis.status: unknown parameter 'reqired', if this is an actual parameter you may want to override the method _valid_field_parameter on the relevant model in order to allow it 
2023-07-18 06:53:28,121 1 WARNING alnshop odoo.fields: Field sale.report.analysis.print_type: unknown parameter 'reqired', if this is an actual parameter you may want to override the method _valid_field_parameter on the relevant model in order to allow it 
2023-07-18 06:53:28,326 1 INFO alnshop odoo.modules.loading: Modules loaded. 
2023-07-18 06:53:28,336 1 INFO alnshop odoo.modules.registry: Registry loaded in 1.572s 
2023-07-18 06:53:28,338 1 INFO alnshop odoo.addons.base.models.ir_http: Generating routing map for key None 
2023-07-18 06:53:28,678 1 INFO alnshop werkzeug: 102.142.116.207 - - [18/Jul/2023 06:53:28] "POST /web/webclient/version_info HTTP/1.1" 200 - 19 0.025 1.888
2023-07-18 06:53:48,908 1 INFO ? odoo.addons.bus.models.bus: Bus.loop listen imbus on db postgres 
2023-07-18 06:54:08,681 1 INFO alnshop werkzeug: 102.142.116.207 - - [18/Jul/2023 06:54:08] "POST /longpolling/im_status HTTP/1.1" 200 - 18 0.018 0.025
2023-07-18 06:54:38,911 1 INFO alnshop werkzeug: 102.142.116.207 - - [18/Jul/2023 06:54:38] "POST /longpolling/poll HTTP/1.1" 200 - 15 0.011 50.281
2023-07-18 06:54:59,648 1 INFO alnshop werkzeug: 102.142.116.207 - - [18/Jul/2023 06:54:59] "POST /longpolling/im_status HTTP/1.1" 200 - 5 0.002 0.006
2023-07-18 06:55:29,390 1 INFO alnshop werkzeug: 102.142.116.207 - - [18/Jul/2023 06:55:29] "POST /longpolling/poll HTTP/1.1" 200 - 9 0.003 50.010
2023-07-18 06:55:50,641 1 INFO alnshop werkzeug: 102.142.116.207 - - [18/Jul/2023 06:55:50] "POST /longpolling/im_status HTTP/1.1" 200 - 5 0.003 0.010
2023-07-18 06:56:19,853 1 INFO alnshop werkzeug: 102.142.116.207 - - [18/Jul/2023 06:56:19] "POST /longpolling/poll HTTP/1.1" 200 - 9 0.004 50.010
2023-07-18 06:56:27,252 1 INFO alnshop odoo.addons.base.models.ir_cron: Starting job `payment: post-process transactions`. 
2023-07-18 06:56:27,258 1 INFO alnshop odoo.addons.base.models.ir_cron: Job `payment: post-process transactions` done. 
2023-07-18 06:56:41,632 1 INFO alnshop werkzeug: 102.142.116.207 - - [18/Jul/2023 06:56:41] "POST /longpolling/im_status HTTP/1.1" 200 - 5 0.004 0.007

Do you guys have any idea ? is it about models or Wkhtmltopdf ?

Thank you guys