After the fourth exam, I accidentally clicked the electronic signature on the screen, and then the staff turned it off and asked me to sign it without success. Does it matter?
You clicked the electronic signature on the screen during the fourth exam, and then the jump was unsuccessful and the staff turned it off. You should report this situation to the staff in time, but it's a late stage, and there may be nothing you can do to talk to him again, so you should talk to the relevant staff in time in the future, otherwise you can't handle it.