I have an existing Xero app that's worked well for over a year that uses OAuth2 to connect a small number of organisations to one of three Web Apps: developer, sandbox, and production. Sandbox and production are working well. However, yesterday I started to create a new instance of the developer app and am unable to complete the first step. My app calls the following URL:
This URL has the same form that has worked for over a year, just with a new client_id, but now I keep getting this error:
Access Denied You don't have permission to access "http://authorize.xero.com/?" on this server. Reference #18.d2fdda17.1671639885.53ec38b
I expect to be redirected to a Xero login page instead.