Seye Kuyinu

Hello Leish, I suggest you go through the check routine yourself.

First of all, check that another theme works on your WP site, if it does, then your theme is problematic. If not check for your .htaccess file in your server’s root directory. Check to see if it’s there. Also, you may want to uninstall your plugins also.

For you to do that, you will need to create a plugin or modify your theme’s function.php file.

Read this tutorial to help you with it.

https://net.tutsplus.com/tutorials/wordpress/creating-a-custom-wordpress-plugin-from-scratch/

I have never tried this and I am a little skeptical about how smooth this transition will be. But first, you need to back up your site. On the new site, install your NextGen and then restore your site on the new blog keeping the same URL structures you had before.

I hope this works.

I also found out instead of using /%postname%/ i used /%postname%

It will definately show an error