Error opening Studio. Message: The input is not a valid Base-64 string as it contains a non base-64 character, more than two padding characters, or an illegal character among the padding characters

Question

Hi, I am trying to open Studio but the following message appears and it closes: 
 The input is not a valid Base-64 string as it contains a non base-64 character, more than two padding characters, or an illegal character among the padding characters 
 
 I've tried several options I read in this forum but none of them works. 
 Can anyone please help me? 
 
 Thanks! 
 
 Mar

Lydia Simplicio · Answer

Mar Ortega de la Plaza - just checking as that error is very unique. Are you using Tridion by any chance: https://gateway.sdl.com/apex/communityknowledge?articleName=000019573 
 Looking forward to your reply 
 Lyds

Trados Studio > 1. Trados Studio

Error opening Studio. Message: The input is not a valid Base-64 string as it contains a non base-64 character, more than two padding characters, or an illegal character among the padding characters

The input is not a valid Base-64 string as it contains a non base-64 character, more than two padding characters, or an illegal character among the padding characters