This sounds like permissions issue for those folders. Can you please find a log file with the latest date from \Logs folder (after you run it from a folder where it doesn't work), check that there are no sensitive data and send it to me to support at onecommander d0t com
By the way, I am not familiar with pcloud but all cloud synchronized folders should be avoided because OC often writes to its tabs and other files, and if sync software locks the a settings/tags/favorites file when OC needs to write in it, it may fail and cause not to save the settings.