It is only the invalid parameter name "output target" error
The space in "output target" causing the error.
I only changed one line in main.c although there other references in help files / batch script etc.
Added an underscore output_target
edit: Your lib files liblqr-1.so.0 are fine
One thing that you might look at while we are here. Common to all Gimp, not just the appimage.
nufraw plugin when executable will stop Gimp opening a SVG image. All depends which you consider most important I usually leave nufraw non-executable until I need it. Might be worth a note to users.
The space in "output target" causing the error.
I only changed one line in main.c although there other references in help files / batch script etc.
Added an underscore output_target
edit: Your lib files liblqr-1.so.0 are fine
One thing that you might look at while we are here. Common to all Gimp, not just the appimage.
nufraw plugin when executable will stop Gimp opening a SVG image. All depends which you consider most important I usually leave nufraw non-executable until I need it. Might be worth a note to users.