We build different application using Power Platform and we have more and more issues importing / upgrading them.

When importing a solution there is step in the process for setting up the connections. That's where we're getting error:

We are getting this error for many accounts, but for some accounts it goes fine, and we can import the solution. For the account that give this timeout, the same issue occurs on other Power Platform environments.

We import Managed Solutions. Same problem if we delete the solution at the destination environment to import fresh instead of upgrading.

We checked the licences on the account. They look ok. The account that worked has the same licences than the one that doesn't work.

We are out of clue here! I would greatly appreciate your help!