Translation override rules error

Summary:

Hi Team

We have created few override translation rule in FCCS but after refreshing database those rules are not visible on the translation override interface . Also, It gives the error : "An unknown error has occurred. Please investigate logs".

Few other observation - 1. Not able to create/save any new rule under translation override 

2. Backup is getting failed

Can someone let me know what can be done to resolve this issue?

 

Content (required):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):