Hi, I have an error 

Odoo Server Error

Traceback (most recent call last):
  File "/opt/odoo13/source/odoo/http.py", line 619, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/opt/odoo13/source/odoo/http.py", line 309, in _handle_exception
    raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])
  File "/opt/odoo13/source/odoo/tools/pycompat.py", line 14, in reraise
    raise value
  File "/opt/odoo13/source/odoo/http.py", line 664, in dispatch
    result = self._call_function(**self.params)
  File "/opt/odoo13/source/odoo/http.py", line 345, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/opt/odoo13/source/odoo/service/model.py", line 93, in wrapper
    return f(dbname, *args, **kwargs)
  File "/opt/odoo13/source/odoo/http.py", line 338, in checked_call
    result = self.endpoint(*a, **kw)
  File "/opt/odoo13/source/odoo/http.py", line 909, in __call__
    return self.method(*args, **kw)
  File "/opt/odoo13/source/odoo/http.py", line 510, in response_wrap
    response = f(*args, **kw)
  File "/opt/odoo13/source/addons_custom/izi_mrp_delivery_packing_barcode/controllers/main.py", line 88, in get_set_barcode_view_state
    return request.env[model_name].browse(record_id).get_barcode_view_state()
  File "/opt/odoo13/source/addons_custom/izi_mrp_delivery_packing_barcode/models/mrp_packing_barcode_model.py", line 170, in get_barcode_view_state
    package_id = self.env['stock.quant.package'].browse(move_line_id.pop('package_id')[0]).read(['id','name'])
TypeError: 'bool' object is not subscriptable.

Anyone can help me, please! 
Thank you very much in advance