I don’t understand all the (Russian?) text in the screenshot. But looking at the numbers, the idea is that the forum goes into a more basic mode if the server load is high?
If so, then yes, you can’t use this functionality. The function to check server load is disabled on our PHP environment, so you can’t check the load.
There is also the fact that this feature is not going to help you on any web hosting service. The typical “server load” shows the processor usage for the whole server. On web hosting, that server is going to be shared with many other websites. That means the server load can be quite high, even though your website gets no traffic at all. Or your website can be throttled because you’re exceeding your power allocation while the overall server load is still very low.
If you have your own (virtual) server hosting only, or primarily, this forum, then the function is useful. On a web hosting account, it’s a pointless gimmick which restricts your site for no reason.