Hi Sami
Thank you for posting to the community! The screenshots are helpful, it seems that there is a network request error returning a 413 error. “A 413 HTTP error code **occurs when the size of a client’s request exceeds the server’s file size limit”.
Please see a suggestion from @hamza to this issue:
If the suggestion doesn’t work, please share the complete Catalina.out log (without authentication/sensitive info) but after trying to save the data set.
Thank you!