More likely a configuration error somewhere. If you're able to get to the tools & settings section you can have it do a diag on the configuration, otherwise I'd probably go and connect to your server via SSH and run the follow command:
This will do a check for all the configurations and ask if you want to do any repair if there's anything.
The Plesk self-repair functionality enables you to automatically diagnose and resolve issues with Plesk and Plesk services. If you encounter an issue with one of the Plesk services (for example, if mail is not being sent or delivered, or a website fails to open, and so on), or with Plesk itself...
docs.plesk.com
Using the Plesk repair utility with the all aspect performs all the checks included in all other aspects. Use the ple...
docs.plesk.com
Resources if you want to learn more about the plesk repair utility.