In cases where the errors continue to occur even after using the Verify Integrity of Game Files option, we consider it to be persistent data corruption - which can unfortunately occur for a number of reasons.
We have a list of solutions in the article here, which we’ve created based on what’s worked for players in the past: https://support.fatshark.se/hc/en-us/articles/360021425793--PC-How-to-Resolve-Data-Corruption-Errors