Can´t add IMAP email to the outlook Desktop APP Windows 11

 I have several emails already in the outlook Desktop APP Windows 11. Some of them are other outlook accounts, some are IMAP.

For some reason I can´t add a new specific IMAP account. I do can add it to the outlook mobile app, and to other email providers, so this is an issue with the desktop app.

A possible hypothesis on why is this happening, is that I already have another email called the same, but with different domain. However, that doesn't give me issue in the mobile app.

I have been having this type of issues with the outlook Desktop APP in the last 2 years. I remember having trouble adding an Outlook account. I assume the app is extremely buggy, and im not the only one having issues adding accounts.