[The icons] could perhaps use better mouse hover labels?
I've noted for quite some time that PICTURE doesn't accurately describe that button's function. I offer DISPLAY WEB IMAGE as more meaningful.
I concur. Maybe "External Image Link" would be descriptive? Maybe a bit on the long side so maybe edit that down to "Image Link"? Cuz I also guess that said image link may well be to some other image already uploaded.
@PitaJ seems to work. Disabled the emoji-pack. Did a ./nodebb build after stopping nodebb. I was able to add a new emoji, then hit the 'build asset' button. Stopped nodebb again, did another ./nodebb build, went back to the emoji panel, no issues, no errors.
Thanks again for the help, sorry I wasn't able to find what went wrong.