I installed PRTG trial a week ago and ran through the tutorial. I have not had time to look into the software again until today and I am getting the below error. The server hosting the PRTG software has plenty of free drive space.
PRTG Network Monitor 126.96.36.19965
The server was stopped
System Emergency. The system was halted, because of the following: The available diskspace is too low! Please attend to the problem and restart the core server service thereafter.