"Email list of all assigned" causes 504 timeout in web UI if accessories image is missing

[curtishall]

During an upgrade I accidently did a 'git stash -a' which wiped out my accessories photos. I didn't think about it until I started getting timeouts when sending email of all assigned equipment. The web UI would spin and after 30 seconds or so the web ui would receive a 504 timeout. The email would be sent...eventually and missing the photos.

I copied the accessory images from a backup and emails instantly send like they should.

I do not see any errors in laravel.log or in the debug session of the web UI.

Version v7.1.15 - build 16052 (master)