Read More button / tag within another tag

Hello everyone,
im looking for a solution to get rid of errors found by validator.w3.org

W3 Validator found problem with “+ Read More” button as it adds a link within allready linked <div>

As a result I get 3 following errors referring to the same part of code:
a class=”moretag” href=”link to the article”

Error: Start tag a seen but an element of the same type was already open.

Error: End tag a violates nesting rules.

Fatal Error: Cannot recover after last error. Any further errors will be ignored.

I was trying to find the place where this part of code is generated just to remove it, as this button isn’t showing up anyway with default resolution and we don’t need to use it anyway. I’ve checked every single .php file within the plugin folder and there is no referring to this part of byline.

Is it possible that this button is somehow generated by another plugin?

Thanks for all answers.

https://wordpress.org/plugins/wp-tiles/