Check log files for possible program failures. When the log file is checked, it is recommended to make a backup of it and remove it from the C:\ProgramData\QPR Software\QPR 2019\2019.1\Servers\Logs directory, especially if the log file is quite large. Note that the client logs are stored in a different folder than the server folders, i.e. in C:\ProgramData\QPR Software\QPR 2019\2019.1\Clients\Logs.
Check available table and transaction log space and increase if needed.