Issue:
How to Fix Can’t Add More Menu in WordPress” ?

Solution 1:
– Login Panel or connect to FTP, and then go to wp-admin, create a new file and name it php.ini, then paste the code below to it, you can change the number , but at least 2000:

max_input_vars = 6000

After that, save and upload it to wp-admin folder. (Sometime, it might need to be saved in root folder, but most of time, it should be located in wp-admin folder)

Now, you should be able to add more menu.

Solution 2:
– Login Panel or connect to FTP, and click to edit the file .htaccess. Now, place the following code in the file:

php_value max_input_vars 5000

(Again, you can change 5000 or any number, but larger than 2000)

After you re-upload the edited file .htaccess, you should be able to add more menu. However, sometimes your hosting company might not allow you to put the php_value in the .htaccess. So the only alternative now is to create php.ini .

Solution 3:

– Contact you host, they will help you handle this problem.