Hi, i have an app in v12 for odoo, but now i try to use this app with the v13 but i cant, if i do the login recive this error:

faultCode no element found: line 1, column 0 faultString Traceback (most recent call last): File "/opt/odoo/odoo13-ivanOdoo/odoo/addons/base/controllers/rpc.py", line 60, in xmlrpc_1 response = self._xmlrpc(service) File "/opt/odoo/odoo13-ivanOdoo/odoo/addons/base/controllers/rpc.py", line 48, in _xmlrpc params, method = loads(data) File "/usr/local/lib/python3.6/xmlrpc/client.py", line 1020, in loads p.close() File "/usr/local/lib/python3.6/xmlrpc/client.py", line 448, in close parser.Parse(b"", True) # end of data xml.parsers.expat.ExpatError: no element found: line 1, column 0

but with an odoo in v12 it works, what can i do for use the app with my odoo v13?? thanks.