The Google Crawl error “et_core_page_resource” error is commonly associated with Divi. This error often appears in Google Search Console’s Crawl Errors report and can impact the indexing and crawling of your website by search engines.
The error is :

<script>var et_site_url=’’ et_post_id=313;function et_core_page_resource_fallback(a,b){“undefined”===typeof b&&(b=a.sheet.cssRules&&0===a.sheet.cssRules.length);b&&(a.onerror=null,a.onload=null,a.href?a.href=et_site_url+”/?et_core_page_resource=”+a.id+et_post_id:a.src&&(a.src=et_site_url+”/?et_core_page_resource=”+a.id+et_post_id))}</script>

Why This Google Crawl Error Occur

This is because you have enabled the Static CSS File Generation option in Dashboard => Divi => Theme Options => Builder => Advanced. This option generates a CSS file to store all of the Divi custom styles which reduces the server requests and gives you extra points on those speed test services

Fix The Error

In this case, we suggest that you disable the Static CSS File Generation option in Dashboard => Divi => Theme Options => Builder => Advanced

That’s it.