collection was modified; enumeration operation may not execute

Question

Studio 2021 throws error "collection was modified; enumeration operation may not execute" when trying to access "Project settings" dialogue. 
 
 Can you help? 
 
 Thanks, 
 Veit

Oana Nagy · Answer

Hi Veit Guenther , 
 Do you still have the issue? 
 If so, it seems like a corrupt Studio installation. Please follow the steps from the below kb article to repair your Studio instance: 
 https://gateway.rws.com/csm?id=kb_article_view&sysparm_article=KB0039395 
 Hope it helps? 
 Regards,

Trados Portfolio > 2. Licensing and Installation

collection was modified; enumeration operation may not execute