After following the instructions provided in your other topic here: https://www.portotheme.com/forums/topic/porto-woocommerce-order-order-details-php-version-4-6-0-is-out-of-date-the-core/#post-1107 if you still face this issue, then there are a few steps you can take to resolve the issue:
Check the file path: Make sure that the file path specified in the error message is correct. Double-check that the file is in the correct location and that the file name is spelled correctly.
Clear your browser cache: It’s possible that your browser has cached an older version of the website, which could be causing the missing file error. Try clearing your browser cache and then refreshing the page.
Disable browser extensions: Some browser extensions can interfere with website functionality, including loading files. Try disabling any browser extensions you have installed and see if that resolves the issue.
Check for server errors: If the missing file is hosted on a server, it’s possible that there is a server error that is causing the file to not be found. Try contacting the website administrator to see if they are aware of any server issues.
Use a different browser: If none of the above steps resolve the issue, try using a different browser to see if the missing file error persists. If it does not, then the issue may be specific to your original browser and you may need to troubleshoot further.