We've said about this issue in the documentation for Soledad theme here
Note that: AMP pages doesn't supports display category mega menu, so, please go to Appearance > Menus > create a new menu for your AMP ( which don't use category mega menu ) > scroll down and check to "AMP Menu".
Since installation of Soledad, Google has been alerting me to the attached AMP error that prevents AMP pages from being displayed in search.
Oops! URL is www.cancerV.me
Hi,
We've said about this issue in the documentation for Soledad theme here
Note that: AMP pages doesn't supports display category mega menu, so, please go to Appearance > Menus > create a new menu for your AMP ( which don't use category mega menu ) > scroll down and check to "AMP Menu".
After that, you can try validate again URLs has issues on https://search.google.com/test/amp to see your AMP is fine or not
Best Regards,
PenciDesign