This isn’t quite right for this forum but I can’t think of where else to put it.
I’m signed into two accounts in Chrome. My personal account is the default and my business account is the secondary. Here are the steps:
- Go to sheets.google.com. Note that the personal (primary) account is the one selected in the top right.
- Switch to the business (secondary) account. This will open a new tab.
- Create a new spreadsheet or select an existing one.
- Select “Extensions | Apps Script” from the menu. This will open in a new tab.
The message “script.google.com redirected you too many times” is displayed briefly, followed by “Bad Request Error 400”.
Everything works fine if I sign out of my personal account or make my business account the default.