How to fix file does not exist error?

Question

Apache HTTP Server

There is a store on UMI.CMS. Recently, the hoster has been complaining that our account is under heavy load.
I did not find anything abnormal in the work of the sites. Only here in erro_log there are a lot of errors File does not exist.
Moreover, if compared with the load schedule, then the most common mistake:

[client IP] File does not exist: /~/public_html/katalog

And such a line can be repeated for an hour. Moreover, physically there is no such folder on the site.
How to be? And who can demand this folder so persistently, for example, at 6 in the morning. Bots?

Answer 1

Did you install any link exchange plugin?