I did some part time IT at my last job. IT really ruins your respect for people and faith in humanity. There were so many tickets we got that were just "I got this error message I didn't read".

Hell, for a few months there was a bug in our ERP's clock in system. The client's time would desync from the server's time (don't know why the system didn't just treat the server time as authoritative), so we added a message when that happened "Please close this program and reopen it, you are not clocked in/out" and it would secretly log the user that didn't clock in. There was one dude that tried like 5 tikes to clock in on the same machine, another time we could see that he got the message and tried a different computer and then another and another and another before finding one that worked.

No one reads error messages no matter how clear and concise they are. No matter how simple the instructions are.