Add-in Error of complements in Word Online with my Personal Account

Hi,

I am getting an error when trying to insert any add-in (such as Mendeley Cite) in Word Online using my personal account.

Error message:
"Add-in Error: We couldn't connect to the catalog server for this document" (Original Spanish error: "Error de complemento: no pudimos conectarnos con el servidor del catálogo {0} para este documento")

Here are the details and the troubleshooting I've already done:

- Account-specific: It works perfectly with my old University account, but fails with my new Personal account.
- Platform-specific: The add-in works fine on the Word Desktop App, but fails on Word Online (web browser).
- Browsers: I have tried different browsers (Chrome, Firefox) and the issue persists.

It seems to be a configuration or permission restriction specific to my personal account on the web version. How can I fix this?

Thank you!