I’ll need to know if this behavior is caused by a conflict with a plugin or theme. Therefore i want to ask you to do the following;

Log in on your WordPress website.
Deactivate all non-Yoast plugins.
Switch your theme to a standard theme like Twenty Fourteen.
Test for the issue again. Does it still occur?

Or

you can edit the following file:

public_html/wp-content/plugins/wordpress-seo/admin/links/class-link-watcher.php

Edit LINE 47:
public function save_post( $post_id, WP_Post $post ) {

Should be:
public function save_post( $post_id, $post ) {

please reply me so, i will help you regarding

Thanks

Thanks for responding.

I just did what you said

Log in on your WordPress website. (DONE)
Deactivate all non-Yoast plugins. (DONE)
Switch your theme to a standard theme like Twenty Fourteen. (DONE)
Test for the issue again. Does it still occur? (DONE)

But it was still showing me the same error

So I tried

public_html/wp-content/plugins/wordpress-seo/admin/links/class-link-watcher.php

Edit LINE 47:
public function save_post( $post_id, WP_Post $post ) {

Should be:
public function save_post( $post_id, $post ) {

Now I’m able to add a new post but the interface doesn’t look the same.

Now it is showing this error >>>
“You are currently editing the page that shows your latest posts.”