i have check and check cant get it to work, would you be so kind to take a look
https://github.com/YahyaKassem/payment_sadad

You are right i found in the log this error

2024-02-18 20:55:26,710 542 ERROR mangrovesllc-test-v2-11813120 odoo.addons.payment_sadad.models.payment_provider: Invalid API request at https://api-s.sadad.qa/api/createInvoice with data:
{'amount': 862.5,
'callBackUrl': 'https://mangrovesllc-test-v2-11813120.dev.odoo.com/payment/sadad/return',
'clientEmail': 'admin@yourcompany.example.com',
'clientMobile': '+1 555-555-5555',
'clientName': 'Mitchell Admin',
'note': 'YourCompany',
'orderNumber': 'S00037-4',
'products': []}
Traceback (most recent call last):
File "/home/odoo/src/odoo/addons/payment_sadad/models/payment_provider.py", line 164, in _sadad_make_request
response.raise_for_status()
File "/usr/lib/python3/dist-packages/requests/models.py", line 943, in raise_for_status
raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 500 Server Error: Internal Server Error for url: https://api-s.sadad.qa/api/createInvoice
2024-02-18 20:55:26,711 542 ERROR mangrovesllc-test-v2-11813120 odoo.addons.payment_sadad.models.payment_provider: {"error":{"statusCode":500,"message":"Internal Server Error"}}
Traceback (most recent call last):
File "/home/odoo/src/odoo/addons/payment_sadad/models/payment_provider.py", line 164, in _sadad_make_request
response.raise_for_status()
File "/usr/lib/python3/dist-packages/requests/models.py", line 943, in raise_for_status
raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 500 Server Error: Internal Server Error for url: https://api-s.sadad.qa/api/createInvoice
2024-02-18 20:55:26,713 542 ERROR mangrovesllc-test-v2-11813120 odoo.http: Exception during request handling.
Traceback (most recent call last):
File "/home/odoo/src/odoo/addons/payment_sadad/models/payment_provider.py", line 164, in _sadad_make_request
response.raise_for_status()
File "/usr/lib/python3/dist-packages/requests/models.py", line 943, in raise_for_status
raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 500 Server Error: Internal Server Error for url: https://api-s.sadad.qa/api/createInvoice

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/odoo/src/odoo/odoo/http.py", line 2150, in __call__
response = request._serve_db()
File "/home/odoo/src/odoo/odoo/http.py", line 1722, in _serve_db
return service_model.retrying(self._serve_ir_http, self.env)
File "/home/odoo/src/odoo/odoo/service/model.py", line 133, in retrying
result = func()
File "/home/odoo/src/odoo/odoo/http.py", line 1749, in _serve_ir_http
response = self.dispatcher.dispatch(rule.endpoint, args)
File "/home/odoo/src/odoo/odoo/http.py", line 1953, in dispatch
result = self.request.registry['ir.http']._dispatch(endpoint)
File "/home/odoo/src/odoo/addons/website/models/ir_http.py", line 235, in _dispatch
response = super()._dispatch(endpoint)
File "/home/odoo/src/odoo/odoo/addons/base/models/ir_http.py", line 222, in _dispatch
result = endpoint(**request.params)
File "/home/odoo/src/odoo/odoo/http.py", line 722, in route_wrapper
result = endpoint(self, *args, **params_ok)
File "/home/odoo/src/odoo/addons/website_sale/controllers/main.py", line 2022, in shop_payment_transaction
return tx_sudo._get_processing_values()
File "/home/odoo/src/odoo/addons/payment/models/payment_transaction.py", line 477, in _get_processing_values
rendering_values = self._get_specific_rendering_values(processing_values)
File "/home/odoo/src/odoo/addons/payment_sadad/models/payment_transaction.py", line 67, in _get_specific_rendering_values
payment_link_data = self.provider_id._sadad_make_request('createInvoice', auth=id_token, payload=payload)
File "/home/odoo/src/odoo/addons/payment_sadad/models/payment_provider.py", line 172, in _sadad_make_request
raise ValidationError(_(detail['detail']))
KeyError: 'detail'

any clues

Did you try contacting the vendor from whom you purchased the app to sort out this issue?

I am trying to make it my self not bought