We frequently encounter the error message "Error reading response: missing /prtg" on a bunch of our sensors, often the ones of type XMLEXESENSOR.
In our shop we have a cluster probe with two nodes.
The above error only shows up on the first node, while the sensor on the other node says "OK". After a while ( could be minutes ) the error disappears and the sensor show OK.
Needless to say that this behavior is annoying when someone relies on the status of the sensor.
I've found a number of related discussions but none of the suggested solutions are appropriate.
Any suggestions/ideas on how to solve this issue? Or directions for further investigating the problem would be helpfull.