Plugin Conflict prevents large image upload

Hi,

I’ve tested this out a few times and it’s DEFINITELY the WP-Invoice plugin that’s at fault…

If I try to upload a larger image (say, more than 2.5 meg) I get an error:

“Post-processing of the image failed likely because the server is busy or does not have enough resources. Uploading a smaller image may help. Suggested maximum size is 2500 pixels.”

None of my other plugins affects this.
Changing the PHP version doesn’t affect this.