Login problem

Hi guys,
we are experiencing a stucking problem.
We are using Auth0, Capacitor and Ionic5 Angular.
In the Android app the post login callback doesn’t work.
We get this error:

D/Capacitor: Sending plugin error: {"save":false,"callbackId":"82790226","pluginId":"Browser","methodName":"close","success":false,"error":{"message":"not implemented","code":"UNIMPLEMENTED"}}
E/Capacitor/Console: File: http://localhost:8100/vendor.js - Line 43878 - Msg: Error: not implemented
E/Capacitor: JavaScript Error: {"type":"js.error","error":{"message":"Uncaught Error: not implemented","url":"http://localhost:8100/polyfills.js","line":2817,"col":29,"errorObject":"{\"code\":\"UNIMPLEMENTED\"}"}}
E/Capacitor/Console: File: http://localhost:8100/polyfills.js - Line 2817 - Msg: Uncaught Error: not implemented

It seems we have a problem with a plugin but we aren’t able to find it
Thanks in advance