Issue: Having problems saving my edits in the card display thread

Lately, I've been getting the following error message whenever I try to save my edits to my post (#1015) in the card display thread.

Fatal error: Maximum execution time of 30 seconds exceeded in /home/aarin504/public_html/forum/includes/functions.php on line 2052 - (The line number changes occasionally but the error is the same each time)

At first, although this error appears, my edits are still saved the next time I have a look at my post so I didn't worry too much about it. However, very recently, I have noticed that my changes aren't saved anymore and I get the same error message when I try to press the go advance button to go preview my edits.

The restore auto-save content works just fine, when I press that, all my edits are there. It's just when I press the post or go advance button that the error message pops up.