That seems to be the problem here, yes.Although it was fixed upstream in 5.51 via https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/obexd/src/obex.service.in?id=78bce480093799c287ac8561b9407fa48796a130, the Debian package ships the unreplaced @libexecdir@ in /usr/share/dbus-1/services/org.bluez.obex.service as the source package patches in its own org.bluez.obex.service.in instead of the up-to-date obex.service.in.
- Bug#972070: bluez-obexd: Failure to browse files, Fail... Jan
- Bug#972070: bluez-obexd: Failure to browse files,... Christopher Schramm
