I have at last located the file which has been growing at an alarming rate over past months and explains why our backup has also been growing.
The file is
/public_html/cli/error_log
and contains 000s of the same entry due to our backup being performed twice daily. It is currently 1.35Gb and started May 2020.
The message is:
[15-Oct-2020 04:16:08 UTC] PHP Warning: preg_match(): Delimiter must not be alphanumeric or backslash in /home/xxxxxx/public_html/administrator/components/com_akeeba/BackupEngine/Filter/Base.php on line 138
Base.php lines 137/138 are:
137 // Normal PCRE
138 if (preg_match($regex, $test))
Kindly advise a fix for this or whether I need to prevent php warnings from being produced.
TIA