Most issues are caused by browser caching or Google permission conflicts. Follow the steps below in order — you usually won’t need more than one section.
If the add-on won’t install, keeps asking for permission, or shows errors:
Open an Incognito / Private window.
Go to Google Docs.
Open the add-on and approve permissions.
Close Incognito.
Reopen Google Docs normally and try again.
This happens when Google permissions are incomplete or cached incorrectly.
Close all Google Docs tabs.
Reopen your document.
Open the add-on again.
If the error remains:
Follow the Quick Fix above.
This is caused by stuck Google login cookies or multiple Google accounts in one browser.
Sign out of all extra Google accounts.
Clear cookies for:
script.google.com
docs.google.com
accounts.google.com
Fully close Chrome.
Reopen Chrome and reinstall the add-on.
Alternative: Install once using Incognito / Private mode.
Your browser is loading a cached version.
Close Google Docs.
Reopen the document.
Open the add-on again.
If still incorrect:
Follow the Quick Fix above.
Use this only if nothing else works.
Go to your Google Account → Security.
Remove Page Size & Margin Sizer for Google Docs™ under Third-party access.
Close all browser windows.
Reopen your browser.
Reinstall the add-on from the Google Workspace Marketplace.
Approve permissions when prompted.
✅ Chrome (after cookie reset)
✅ Safari
🔧 Incognito / Private mode for first-time setup
Contact support and include: cosmicpublicationsinc@gmail.com -> Contact US
Browser type
Error message (if any)
Whether you tried Incognito / Private mode