Resolved The site refuses to load on my device after activities into WP Admin: Is it due to lack of PHP memory?

[DigitalSplendid]

Server operating system version

Web Admin

Plesk version and microupdate number

18.0

At times just after I do some activity (such as removing comments) after logged into WP Dashboard, the site stops loading on my device. This is resolved after few minutes. Is it due to lack of memory which can be resolved if PHP memory limit raised?

 

[Maarten.]

What you describe is a typical fail2ban behavior when the plesk-modsecurity jail is active.
Try to disable plesk-modsecurity jail and see if that works for you:

Fail2Ban Jails Management

Advanced users might also be interested in configuring the way the so-called Fail2Ban jails are used to block IP addr...

docs.plesk.com

Also, check if your IP address is banned by fail2ban. Have a look at /var/log/fail2ban.log

 

[DigitalSplendid]

Thanks! It is good to know this level of security provided by Plesk as part of Plesk Web Admin SE Edition. I will prefer to keep this jail active.