Why “Post” is not getting updated whereas “Page” is getting updated

Recently, I have an issue with updating my contents in any post not the pages.

If I make any change in the page, and clicking update button does its service perfectly.

But when I update a post after making some necessary corrections, the update button just loading, not updating the post. Even preview changes is not working. Its just calls post.php but that too not working.

Somehow I am not interested in uninstalling all the plugins, since my website is already running online and people started registering for the event.

Uninstalling a plugin causes problems. For example, by the time i have uninstalled the page builder, all the pages which was prepared using page builder got collapsed.

Expecting a solution.

Thank you for helping!!!