A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hi, Grace Kibe-Hicks
This sounds less like a Claude-only problem and more like Office for Mac losing the sign-in/add-in cache after you signed out. The “Error loading add-ins” message can happen when Office cannot verify the add-in/store sign-in properly. Office add-ins use local cache, and clearing it can help with add-in errors.
Here are some suggestions you can try:
First, fully quit Word, Excel, PowerPoint, and Outlook. Then open Finder, select Go from the top menu, choose Go to Folder, and paste this path:
~/Library/Containers/com.Microsoft.OsfWebHost/Data/
Move the contents of that folder to Trash, then reopen Office and sign in again. It is recommended that you do this before trying to install Claude again, because this folder stores Office web add-in data on Mac.
If that does not work, check whether Office is signed in with the same Microsoft account that originally had the add-in working. If you have both a work/school account and a personal account, sign out of the wrong one and sign in with the correct one first. This matters because Office add-ins shown in “My Add-ins” can depend on the subscription/account currently signed into Office.
Also check your Mac date and time under System Settings > General > Date & Time and turn on automatic date/time if it is off. Incorrect date/time is usually listed as one cause of “Error loading add-ins” during installation.
If it still loops back to the Store, try installing Claude in Word/Excel/PowerPoint on the web at office.com. If it works there but not in the Mac apps, that points to the local Office profile/cache rather than your Claude account.
Thank you for your patience in reading, I hope this information has been helpful to you.
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