Hi @codeare,
It sounds like the Max Mega Menu plugin might not be compatible with Gutenberg yet. I would recommend reporting this to the plugin developer:
https://ww.wp.xz.cn/support/plugin/megamenu/
That way they can work with the Gutenberg development team to determine the source of the bug.
Hi @codeare,
I’ve checked MMM with Gutenburg 3.6.2 and it’s working OK here.
Please can you try disabling all plugins except for MMM and Gutenburg? Maybe another plugin, or possibly your theme, is conflicting.
Regards,
Tom
Quick update, there are more details here:
https://github.com/Yoast/wordpress-seo/issues/10871
Regards,
Tom