I checked the files you shared. The one named Reachfoto_raw_20231019082510.23O looks great. Its NAV file is complete and contains a string with info about leap seconds, the seconds are integer, and the observation file is of good quality as well.
However, what I noticed is that some of the signals (mostly L2) start recording several seconds after the log begins. You can see gaps at the beginning of the log:
Can you please trim the first 5 minutes of the log and try to process it in POSPac once again? To trim the log, you can use the Convert to RINEX tab in Emlid Studio: