There’s not enough information in the error message alone to solve this. @ManasPurohit said they also exhausted our developer support. However, that channel is currently the best option for most authentication problems because the best way to debug include sharing secrets or other client-unique information (like X-Atlassian-* response headers). For those who would prefer to share their problems here in the community, please follow these community guidelines:
I’m going to lock this thread in favor of having new topics with the details of each case. Please provide details like how you have executed the flow (which language & library), what scopes you have selected and sent, and which target APIs you are trying to use.