Fatal error: When clicking save menu after creating custom links

Hi creating custom links in the WP dashboard, and evertime i save it i get the same fatal error, but on a different line, It is always in the public_html/wp-includes. I started recording after i noticed the line was changeing.
1. Fatal error: Maximum execution time of 30 seconds exceeded in /home/mtb1701/public_html/wp-includes/post.php on line 1727

2. Fatal error: Maximum execution time of 30 seconds exceeded in /home/mtb1701/public_html/wp-includes/post.php on line 1737

3. Fatal error: Maximum execution time of 30 seconds exceeded in /home/mtb1701/public_html/wp-includes/post.php on line 1683

I also noticed it once in the plugin php online 127.

I have been making custom links for US Counties in US States, this only started happening on TX. So i have done ove 30 states with no problems.

I deactivated all plugin when i saw the error on plugin php line 127, I t then switch to post php, i reactivated the plugin and it still seems to be only in post php as of now.