Password issue with IMAP

Good morning,

Since yesterday I can send but no longer receive e-mails with eM Client on my PC, I get the following pop-up message:


The issue seems to be only on the Imap server. But on my other devices I can send/receive mails without problem.

Can anybody please help?

Many thanks & best regards

Daniel Salvador

PS: how can I upgrade to the latest version of eM Client? Txs