This was Endeavor OS for me last night on the laptop:
cp /etc/resolv.conf /tmp/calamares-root-krk32ou8/etc/ finished with exit code 1.
I'm never wasting my time with that thing ever again. I don't like Mint but at least it installs without stupid errors.
Yep, that was it. Apparently 1.1 MB PNG was too big. Thanks!