Hi,

The PHP error “Regular Expression Limit Reached (pcre.backtrack_limit)” in Joomla means that the PCRE (regex) engine in PHP has exceeded the backtracking limit while processing a very complex or long regular expression. This is not a Joomla or component bug itself, but a limitation of PHP settings.

Imcrease limit PCRE in PHP by (3 methods):

1. In php.ini file

   pcre.backtrack_limit = 5000000
   pcre.recursion_limit = 500000

2. In .htaccess file

   php_value pcre.backtrack_limit 5000000
   php_value pcre.recursion_limit 500000

3. In cPanel / DirectAdmin

Go to PHP Settings / PHP Options

find pcre.backtrack_limit and set higher value.

Those are system solutions, if above will not work or you prefer this way: contact with Hosting Support they know where & how.

Otherwise, you have to use a back-end editor that uses fewer resources than a front-end editor.