I just noticed, and I have not changed the bits.
dmesg:
systemd[1]: Configuration file /usr/lib/systemd/system/urbackupclientbackend.service is marked executable. Please remove executable permission bits. Proceeding anyway.
ls -l /usr/lib/systemd/system/urbackupclientbackend.service
-rwxr-xr-x 1 root root 240 5 maj 20.24 /usr/lib/systemd/system/urbackupclientbackend.service
Binary Linux client installed with TF=$(mktemp)…etc