1) Provide us with the error screenshot?
2) I don’t understand your question. Could you, please, explain in more detail?
3) I see that you use Cookie Notice & Compliance for GDPR / CCPA plugin. Try to disable it and check.
4) Enable AMP plugin, clear the cache and visit your site using mobile device. If you did not clear the cache after plugin enabling probably you’ll get not AMP version.
5) Images on your home page have huge size https://prnt.sc/1d73jg5
Optimize all the images that you use using https://tinypng.com/ or any other optimization tools.
