Hello @Lotshwao ,
Does the connector work in the workflow to retrieve data?
Also, did you add the offline token in the swagger definition?
https://help.nintex.com/en-US/xtensions/04_Reference/Tutorials/OAuth.htm?tocpath=Connect%20and%20authenticate%7C_____3#Ensuring
Important: Using a refresh token may require a specific scope, such as `offline_access`. You will need to define this scope in your security definition to use the refresh token. Refer to the documentation for your API for more details.
If you find the connect works just after registering and then after some time, it doesn’t work - you might find the token is not getting refreshed. This is usually caused as the offline_access hasn’t been specified.
If this is not the case, you might need to get some help from the Professional Services team as custom xtensions can get quite tricky with authentication.