Structured Data Errors

Hello! Google Structured Data gives me a lot of errors on pages and posts.
How it can be fixed?

Also, you have errors on demo too, but in shop.
https://search.google.com/structured-data/testing-tool#url=http%3A%2F%2Fdemo.xtemos.com%2Fbasel%2Fshop%2Faccessories%2Flondon-ampersand-cushion%2F

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found some info, maybe it can help?
https://www.wpcub.com/fix-missing-required-field-entry-titleupdatehcard-error-in-wordpress/

Hello,

By default, with standard WordPress theme is this structured data exists? Our theme supports structured data for WooCommerce products only.

Regards

[Author]

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