No longer possible to login with pgAdmin 4 9.18 after upgrade

[Serge De Maseneer]

Dear Sirs,

Since upgrading to the latest version 9.18 I can't login in the server 
anymore through pgAdmin 4. I tested with version 9.17 and login (same 
credentials) worked fine.

This is the error i get when trying to login:

Please advise.


Kind regards,

Serge