getting error with custom post type

http://ww.wp.xz.cn/support/plugin/multiple-content-blocks

getting error with this plugin in custom post type sometime show post type some time not show while we add new one post with custom post type not show content blocks in admin. please suggest me what i don in this condition i see your all reviews please help me in this condition.
written error in below comments

It doesn’t look like we can automatically initialize the blocks. Visit this page in the front-end and then try again.

To turn off this option entirely, go to the settings page and disable HTTP Requests. You will still need to perform the steps above.

https://ww.wp.xz.cn/plugins/multiple-content-blocks/