Top News to Post Page Won’t Save

Hi, I recently set the top news to post page setting to display all the rules on 1 page only. I have 412 rules set. The problem now is that every time I pressed the Save Settings button, it will not save. Please see attached screenshot. I tried troubleshooting it by disabling all my other plugins except for Newsomatic, but found no conflict there. I then tried deactivating and deleting the Newsomatic plugin, and re-install it again. When I tried that, the Top News to Post page still shows the same settings (showing all 412 rules) from the previous install. Is there a way to troubleshoot the Saved Button. Or bulk delete all the rules. Or return the Newsomatic plugin back to default settings? thanks