The Information system blocks users who use automatic click repeaters and thus overload the system, eg when registering for exams. The system will be blocked after exceeding the operation limit for monitored applications. To unlock, it is necessary for the user to reset the operation counters by copying the control code from the image.
The number of operations performed and a description of the protection mechanism can be found in
The Information system System (Use) Numbers of Operations Performed, Antiscraping