Error Message "Code:500 Message:list of installed language pairs could not be updated Details:yaml"

Some users have experienced this error when upgrading to SDL ETS 8.3.

The linked article may help you to correct the issue or alternatively raise a support request and reference this article or community link.

https://gateway.rws.com/csm?id=kb_article_view&sysparm_article=KB0035545

Andrew