Bug in joomla template?

Question

PHP

An error appeared on the vavilon.md website for a
week I didn’t visit the site and then this
Warning: preg_replace_callback(): Requires argument 2, '', to be a valid callback in /home/vavilon/public_html/libraries/joomla/filter/input. php on line 1165
Warning: preg_replace_callback(): Requires argument 2, '', to be a valid callback in /home/vavilon/public_html/libraries/joomla/filter/input.php on line 1172
Warning: preg_replace_callback(): Requires argument 2, '', to be a valid callback in /home/vavilon/public_html/libraries/joomla/filter/input.php on line 1165
Warning: preg_replace_callback(): Requires argument 2, '', to be a valid callback in / home/vavilon/public_html/libraries/joomla/filter/input.php on line 1172
Warning: preg_replace_callback(): Requires argument 2, '', to be a valid callback in /home/vavilon/public_html/libraries/joomla/filter/input.php on line 1165
how to fix?

Answer 1

In general, everything seems to be written there, what and where it mows.
If it interferes with the site, then fix it.
If it doesn’t interfere and mess around, turn off error output.
There is an option in the Joomla admin panel, as well as php.ini to help.

Answer 2

that's how it's written