MuseScore: Unknown file detected

[probonopd]

code/worker.sh: line 57: [: PE: binary operator expected
code/worker.sh: line 70: [: too many arguments
code/worker.sh: line 73: [: too many arguments
Unknown file detected

Most likely a worker.sh bug!
https://travis-ci.org/AppImage/AppImageHub/builds/266226547#L537-L540

Same here:
https://travis-ci.org/AppImage/AppImageHub/builds/266230544

[probonopd]

OpenShot is also not detected, why?
https://travis-ci.org/AppImage/AppImageHub/builds/266227618