errrors on submitting page

i keep getting this error every time i try to update a page.



Warning: preg_match_all(): Compilation failed: invalid range in character class at offset 11 in /home/customer/www/cotegic.com.au/public_html/wp-content/plugins/js_composer/include/autoload/hook-vc-grid.php on line 162


Warning: Cannot modify header information - headers already sent by (output started at /home/customer/www/cotegic.com.au/public_html/wp-content/plugins/js_composer/include/autoload/hook-vc-grid.php:162) in /home/customer/www/cotegic.com.au/public_html/wp-admin/post.php on line 231




any ideas on a fix?

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