Hi there!
I recently updated an old forum board's gallery (don't recall the previous version) but now I'm getting a fatal error.
If anyone can help me that would be amazing.
Link to my gallery that's being referenced: http://www.texashotboats.com/gallery/
What version of php are you running? And what version of Coppermine did you upgrade to?
It seems to be cpg1.5.46. You could try to update to cpg1.6.x, maybe it fixes the issue.