RTKbase file question

I’m setting up a RTKbase but after loging for 24 hours and I try to create a Rinex file it complains it can’t process more than one file. The only files in there is the zip and UBX files. Does anyone have experience with this ? I’ve reflashed the Pi for it before and had it working once but now at a new location it’s acting up again. The image below is from Stefal’s turtorial