Welcome Tonya Anderson,
Thanks for reaching out to Microsoft Q&A Forum. I understand that Copilot is not working as expected across your devices and that you are also seeing add-in loading issues in Microsoft 365 apps despite having an active subscription.
To narrow this down:
- Which Microsoft 365 subscription and Copilot license are you currently using?
- Are you signed in to Copilot and Microsoft 365 with the same Microsoft account on both the PC and the phone?
In the meantime, you can try these steps:
Step 1: Verify account consistency
- Open Copilot on both devices.
- Confirm the same Microsoft account is signed in everywhere.
Step 2: Check Microsoft 365 activation
- Open any Office app.
- Go to File > Account.
- Confirm the subscription shows as active.
Step 3: Update Microsoft 365
- Open any Office app.
- Go to File > Account > Update Options > Update Now.
Step 4: Investigate the add-in error
- In Excel, select File > Options > Add-ins.
- Review any disabled or failed add-ins.
- Re-enable them if available.
Step 5: Sign out and back in
- Sign out of all Microsoft 365 apps.
- Restart the device.
- Sign back in and test Copilot again.
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