GUI shows error when resolving all files in a matchgroup

[RedSackles]

Describe the bug
When resolving all files (well in my case that is usually 2) in a match-group by ticking their boxes and using the batch action option on the right.
The GUI will show "A server error occurred" and leave the match-group on screen.
When you refresh the page it wont show the match-group any more as it was apparently resolved.

To Reproduce
scan a folder with matching image files
open the job results
open a match-group
Select all the checkboxes under the files.
remove/resolve using the batch action option on the right side.

Expected behavior
Resolve the matches and close the match-group in the GUI.