Kindly follow the instructions below.
First login to MyPostBuilder dashboard and under Settings tab you'll find all the setting configurations you need to setup.
Here are the steps.
Step 1 : Add your website to MyPostBuilder
Step 2 : Install the Auth-Basic plugin in your WordPress and make sure your WP login page is free of the dreadful captcha.
Step 3 : Is your WP version up to date? Make sure it is :)
You may follow this video to update your WP version.
If you still couldn't post, we are here to help.
Submit a support ticket and our 24/7 support team is ready to help you at anytime!