Linux users are being penalised points. I don't like spending time fixing your sh*t.
fc-list: /home/blahblah/slots/10/libz.so.1: version `ZLIB_1.2.9' not found (required by /usr/lib/libpng16.so.16)

Is this a work around? Since each project json starts with the zip file
In the project rnma.xyz folder, create a link to /usr/lib64/libz.so.1
in the project folder, app.1.06 zip rename the libz.so.1.old
add the libz link to the zip file

in each slot (and I have quite a few) - for every slot
rename the libz.so.1.old
create a link to /usr/lib64/libz.so.1

How about it? Does this work? If it doesn't I won't be using your fckn broken app. Otherwise fix your own broken sh*t.