404 errors on subdomains

[dallass]

Hello,

I have a VPS server on which there is installed LiteSpeed 5.4.7 build one.
On this server I run a WordPress multi-site (version 5.4.0) with 4 subdomains.
Lately, I have very often 404 errors on the subdomains. The main domain (the main site in the WordPress network) works just fine.

I correct the problem by restarting LiteSpeed. So, I assume it is a problem with the LiteSpeed.

How can I check where is the problem ? What can I do do to solve this, please ?

P.S. In the WordPress, I also use the LiteSpeed Cache plugin.
But, I am guessing the problem doesn't come from this as I disable it and then I had again the same 404 errors.

 

[Pong]

Your error pattern has not shown enough info to be LiteSpeed web server related issue. Find reliable steps to reproduce the issue.

 

[dallass]

How can I find the reliable steps ? Is there a log of LiteSpeed errors or something ?
Actually, this was the question.
The error it is definitely form LiteSpeed.

 

[Pong]

Radom issue is impossible to troubleshoot. You will need to find how to see 404 repeatedly and reliably. Otherwise, how can you say "definitely form LiteSpeed"？ No way for us to do any troubelshooting either.