Already known, the existing Gutenberg support is (and will be) still experimental. It should work if you use the shortcode-block and not the WP-Appbox block (or Classic Editor ;-))
https://ww.wp.xz.cn/support/topic/doesnt-work-in-live/
https://ww.wp.xz.cn/support/topic/doesnt-show-properly-on-my-site/
https://de.ww.wp.xz.cn/plugins/wp-appbox/#is%20the%20gutenberg%20editor%20supported%3F
https://ww.wp.xz.cn/support/topic/ampforwp-support-2/`
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This reply was modified 4 years, 3 months ago by
Marcelismus.
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This reply was modified 4 years, 3 months ago by
Marcelismus.
Seems to be working now after I checked this box Render the output of the appboxes in Gutenberg as a preview (Experimental)
However on one of our site it kinda turns off the font on editor screen