Issues connecting to internal websites through VPN for non-IT users

Dear all,

We are experiencing some issues when connecting through VPN to internal websites (intranet/, meetingrooms/, etc).

We get the error: If JavaScript is not enabled, please click here to continue.

And it loops... 

If I login with an IT user, it works perfect, but it doesn't for the other users...

Could you please help me?

Many thanks!