Authentication Error

[matyas]

I was using version 4.0.7.0 and everything worked perfect.

update all the PCs to version 4.1.7.1 and in several the authentication error occurred. I can not solve.

I have tried everything.

modify the IP
Enable ports on router
install the previous version
generate new keys and import them

[tobydox]

Hello, I suggest to increase the log level to "Debug" in Configurator, clearing log files and take a look at the log files on the affected clients (C:\Windows\Temp\VeyonServer.log) after opening Veyon Master on the teacher computer. You might find further information in the log files on what's going on and what causes the failure.