that is correct. the UI- layer integration you are seeing within project properties for TestComplete is for Zephyr for Jira, not Zephyr Scale.
In order to connect TestComplete with Zephyr scale, you must leverage Zephyr Scale's REST api
please file a support ticket at https://support.smartbear.com/testcomplete/ (the button is at the bottom left of the screen on the page)
do you by chance have both Zephyr Scale and Zephyr for Jira located on that Jira instance? (that is the only other time I've ever ran into that error)
I believe it's due to Atlassian changes to create the JWT token... something to do with requiring the Atlassian user profile ID as an additional field or header when making the requests.
The my Jira Instance is installed Zephyr Scale (TM4J). I saw some tutorials, articles and the only way to connect Zephyr Scale and TestComplete is through the REST API, is that correct?
that is correct. the UI- layer integration you are seeing within project properties for TestComplete is for Zephyr for Jira, not Zephyr Scale.
In order to connect TestComplete with Zephyr scale, you must leverage Zephyr Scale's REST api
