@stefacchio We’re sorry to hear you are experiencing this issue on your site.
We reviewed the error log that you provided but we don’t see any errors that are related to the Yoast SEO plugin, so this doesn’t appear to be an issue we can offer you any assistance with.
Many of the errors appear to be of the ‘Failed to open stream: No such file or directory’ type. This error occurs when a plugin installation or update couldn’t complete correctly. The fatal error is telling you that the plugin couldn’t find one of the core plugin files. In this case, to resolve we would recommend to reinstall it manually to see if this resolves the issue.