The requested URL could not be retrieved

While trying to retrieve the URL:

The following error was encountered:

The system returned:

    (24) Too many open files

Squid is unable to create a TCP socket, presumably due to excessive load. Please retry your request.

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Generated Thu, 04 Mar 2021 03:46:39 GMT by POW_CDN_squid_System (squid/2.7.STABLE8)