I realize this thread isn’t solved and others are hitting a similar error message, but I think this error message is “same symptom” with multiple underlying causes. For example, @SilvreLestang is right that this error message is common for cross-product apps. But it’s clear from this thread that it happens for other developers when only used in a Jira app to call Jira. And it may or may not be intermittent.
So, I’m going to close this thread and ask folks like @YY1 who are currently suffering to create a new topic with more context. With more detailed cases, perhaps we can find the other reasons than just the cross-product problem.