Forms Designer Forum

I checked the new item in cross-site lookup field, it should add a new item to the document library but I get this error:
Sorry, something went wrong
An unexpected error has occurred.
TECHNICAL DETAILS

Troubleshoot issues with Microsoft SharePoint Foundation.
Correlation ID: 86d0ae9f-403c-b000-c843-98b6566c8cc3

Can you please assist?

Dear Panteha,
Could you show us a screenshot? When exactly does it appear? Did you customize New form with Forms Designer or any other tool?