FreeBSD deletes /var/run files, including viperserv bin directory.
This is annoying, as 794d367a populated /var/run/viperserv/bin with symlinks to rDWD scripts.
The symptom @Thibaut120094, Poulpy and Hsazarrin have experienced is the bot correctly prints error message, but don't run the script. This is coherent with the 2018-02-22 server reboot.
We need to host those files elsewhere. @amj recommends /usr/share, according man hier.