Hello, I am working with the py3o report engine module to create reports in ODT format, and it works as follows.

Button example: 

        string="Print req inm" class="btn-success"/>

Function:

def report_req_inm​(self):

return self.env.ref('print_mobile.print_report_inm').report_action(self)

XML REPORT:

    Print req inm mobile

    tram.req

    Req_inm_mobile

    py3o

    docx    

    print_mobile

    report/req_inm_report.odt

    report

So I have them linked, then I no longer work on the odt...

At first they work, the reports are printed without any problem... here the issue is that from one moment to the next I could no longer print the reports due to the following error.

In the Odoo interface it shows the following:

//The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.//

Now in the log it shows me the following error (I really don't know why it appears):

//TypeError: Object of type MaxRetryError is not JSON serializable//

The log shows me that this line of code is being returned directly from the py3o/controllers/main.py module

except Exception as e:

            se = _serialize_exception(e)

            error = {"code": 200, "message": "Odoo Server Error", "data": se}

            return request.make_response(html_escape(json.dumps(error)))

Is there any way to solve this error and to be able to print the reports again?

Odoo 14 community

Thank you all.