Fix issues with multiple Google Accounts
If you're logged into multiple Google Accounts at the same time , you might have trouble accessing your add-ons and web apps. Multi-login, or being logged into multiple Google Accounts at once, isn't supported for Apps Script, add-ons, or web apps .
If you experience multi-login issues, try one of the following solutions:
Log out of all your Google Accounts and only log in to the one that has the add-on or web app you want to access.
Open an incognito window in Google Chrome, or an equivalent private browsing window, and log in to the Google Account that has the add-on or web app you want to access.