If you are logged into Amazon Seller central but keep seeing the "Please log in to Amazon Seller Central" dialog box, this is usually caused by one of the cases listed below:
Case #1: You are only logged into Amazon with a buyer account and have not logged into Amazon Seller Central using your seller account.
Solution: Please log in to Amazon Seller Central
Case #2: Your browser has a damaged AZInsight installation
Solution: Reinstall AZInsight following this guide
Case #3: Another Amazon Chrome Extension is blocking the ability of AZInsight to detect if you are logged into Amazon Seller Central
Solution: Turn off all chrome extensions except AZInsight and then turn them back one by one to eliminate the possible extension that is causing the conflict
Case #4: The version of AZInsight you have installed is outdated
Solution: Update to the latest version following this guide
Case #5: The version of Chrome Browser is outdated