Title: Start Profiling Generates cURL Error Last modified: December 5, 2024 --- # Start Profiling Generates cURL Error * Resolved [kennycheung](https://wordpress.org/support/users/kennycheung/) * (@kennycheung) * [1 year, 6 months ago](https://wordpress.org/support/topic/start-profiling-generates-curl-error/) * When I click on Start Profiling, I get an error message: “Cannot connect to the requested page: cURL error 7: Failed to connect to parr.com port 443: Connection refused” I get the same error when I disabled Wordfence and Solid Security Basic plugins. I don’t see any errors in debug.log after I enabled WP_DEBUG and WP_DEBUG_LOG. The site cURL version is 7.64.0 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fstart-profiling-generates-curl-error%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 13 replies - 1 through 13 (of 13 total) * Plugin Author [nintechnet](https://wordpress.org/support/users/nintechnet/) * (@nintechnet) * [1 year, 6 months ago](https://wordpress.org/support/topic/start-profiling-generates-curl-error/#post-18180421) * When the profiler tries to connect to admin-ajax.php, the connection is refused. Your site is not secure. Here’s the error I receive when connecting to it: * > curl: (60) SSL certificate problem: self-signed certificate in certificate > chain > More details here: [https://curl.se/docs/sslcerts.html](https://curl.se/docs/sslcerts.html) > curl failed to verify the legitimacy of the server and therefore could notestablish > a secure connection to it. To learn more about this situation andhow to fix > it, please visit the web page mentioned above. * Even my browser refuses to access it: * > net::ERR_CERT_AUTHORITY_INVALID > its security certificate is not trusted by > your computer’s operating system. This may be caused by a misconfiguration > or an attacker intercepting your connection. * You need to use a valid SSL certificate and removed the self-signed one. * Thread Starter [kennycheung](https://wordpress.org/support/users/kennycheung/) * (@kennycheung) * [1 year, 6 months ago](https://wordpress.org/support/topic/start-profiling-generates-curl-error/#post-18181564) * Our IT department said they have a CA. They are wondering if it might be our firewall if your plugin is trying to access from the outside via https content inspection. * ![](https://i0.wp.com/parr.com/wp-content/uploads/2024/12/CA.png?ssl=1) * ![](https://wordpress.org/e0d97e0a-035a-4694-b0c9-48c8eb19e59d) - This reply was modified 1 year, 6 months ago by [kennycheung](https://wordpress.org/support/users/kennycheung/). * Plugin Author [nintechnet](https://wordpress.org/support/users/nintechnet/) * (@nintechnet) * [1 year, 6 months ago](https://wordpress.org/support/topic/start-profiling-generates-curl-error/#post-18182694) * Yes it is: the firewall returns a message, but because its SSL certificate is self-signed, it is not displayed. Instead, cURL (or even a browser) stops immediately because of the invalid certificate. Code Profiler must access the `wp-admin/admin- ajax.php` endpoint, so make sure your firewall allows your server to connect to itself. You can go to “Tools > Site Health” to make sure there’s no other error on your WordPress installation too.Also, check with your admin if they can install a valid certificate for the firewall so that users will know why there are blocked. * Thread Starter [kennycheung](https://wordpress.org/support/users/kennycheung/) * (@kennycheung) * [1 year, 6 months ago](https://wordpress.org/support/topic/start-profiling-generates-curl-error/#post-18187834) * Isn’t a certificate issued by Sectigo RSA Domain Validation Secure Server CA a valid certificate? * Site health: * ![](https://i0.wp.com/parr.com/wp-content/uploads/2024/12/site-health.gif?ssl =1) - This reply was modified 1 year, 6 months ago by [kennycheung](https://wordpress.org/support/users/kennycheung/). * Plugin Author [nintechnet](https://wordpress.org/support/users/nintechnet/) * (@nintechnet) * [1 year, 6 months ago](https://wordpress.org/support/topic/start-profiling-generates-curl-error/#post-18188963) * The problem is not the website certificate, but the firewall’s. Here are its 3 chained certificates: * depth=1 CN = WatchGuard Certificate Authority, O = Parr Lumber **verify error: num=19:self-signed certificate in certificate chain**verify return:1depth=1 CN = WatchGuard Certificate Authority, O = Parr Lumberverify return:1depth=0 CN = 38.142.109.178, O = Parr Lumberverify return:1 * As you can see, the first one is self-signed and that’s the reason why cURL stops processing the request. * Thread Starter [kennycheung](https://wordpress.org/support/users/kennycheung/) * (@kennycheung) * [1 year, 5 months ago](https://wordpress.org/support/topic/start-profiling-generates-curl-error/#post-18195718) * IT appears to have fixed the cURL issue. Now I get the error below – even when I use the lowest Accuracy and Precision setting and after IT gave the site more RAM. * The HTTP server returned the following error: 503 Service Unavailable You can try to select a lower Accuracy and Precision level in the Settings page. * Plugin Author [nintechnet](https://wordpress.org/support/users/nintechnet/) * (@nintechnet) * [1 year, 5 months ago](https://wordpress.org/support/topic/start-profiling-generates-curl-error/#post-18197342) * Click on the “Logs” tab, and scroll to the HTTP response log: what do you see? * Thread Starter [kennycheung](https://wordpress.org/support/users/kennycheung/) * (@kennycheung) * [1 year, 5 months ago](https://wordpress.org/support/topic/start-profiling-generates-curl-error/#post-18197898) * Only “The HTTP response log is empty.” * Plugin Author [nintechnet](https://wordpress.org/support/users/nintechnet/) * (@nintechnet) * [1 year, 5 months ago](https://wordpress.org/support/topic/start-profiling-generates-curl-error/#post-18198755) * Click the “Support” tab, and search for `[admin-ajax]` . Do you see `[access] => OK` or an error? * Thread Starter [kennycheung](https://wordpress.org/support/users/kennycheung/) * (@kennycheung) * [1 year, 5 months ago](https://wordpress.org/support/topic/start-profiling-generates-curl-error/#post-18198861) * Yes: * ```wp-block-code [admin-ajax] => Array ( [access] => OK ) ``` * Plugin Author [nintechnet](https://wordpress.org/support/users/nintechnet/) * (@nintechnet) * [1 year, 5 months ago](https://wordpress.org/support/topic/start-profiling-generates-curl-error/#post-18201469) * It seems to work as expected. Can you check your PHP error log ? It should show the error.If you can’t find any log, you can enable debugging in WordPress: 1. Edit your wp-config.php file. 2. Search for: `define('WP_DEBUG', false);` 3. Replace with: `define('WP_DEBUG', true);` 4. Add this line below: `define( 'WP_DEBUG_LOG', true );` * Try to run the profiler until you get the error and check the log that will be saved to “/wp-content/debug.log”. * Thread Starter [kennycheung](https://wordpress.org/support/users/kennycheung/) * (@kennycheung) * [1 year, 5 months ago](https://wordpress.org/support/topic/start-profiling-generates-curl-error/#post-18202311) * It didn’t add anything to the debug log. I cleared it out the log before running the profiler. * Plugin Author [nintechnet](https://wordpress.org/support/users/nintechnet/) * (@nintechnet) * [1 year, 5 months ago](https://wordpress.org/support/topic/start-profiling-generates-curl-error/#post-18206886) * The error occurs at a lower level: either your HTTP server or maybe the firewall? Can you check their error log? Viewing 13 replies - 1 through 13 (of 13 total) The topic ‘Start Profiling Generates cURL Error’ is closed to new replies. * ![](https://ps.w.org/code-profiler/assets/icon-256x256.png?rev=3143506) * [Code Profiler - WordPress Performance Profiling and Debugging Made Easy](https://wordpress.org/plugins/code-profiler/) * [Frequently Asked Questions](https://wordpress.org/plugins/code-profiler/#faq) * [Support Threads](https://wordpress.org/support/plugin/code-profiler/) * [Active Topics](https://wordpress.org/support/plugin/code-profiler/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/code-profiler/unresolved/) * [Reviews](https://wordpress.org/support/plugin/code-profiler/reviews/) * 13 replies * 2 participants * Last reply from: [nintechnet](https://wordpress.org/support/users/nintechnet/) * Last activity: [1 year, 5 months ago](https://wordpress.org/support/topic/start-profiling-generates-curl-error/#post-18206886) * Status: resolved