Title: tomcatwpdev's Replies | WordPress.org --- # tomcatwpdev [ ](https://wordpress.org/support/users/tomcatwpdev/) * [Profile](https://wordpress.org/support/users/tomcatwpdev/) * [Topics Started](https://wordpress.org/support/users/tomcatwpdev/topics/) * [Replies Created](https://wordpress.org/support/users/tomcatwpdev/replies/) * [Reviews Written](https://wordpress.org/support/users/tomcatwpdev/reviews/) * [Topics Replied To](https://wordpress.org/support/users/tomcatwpdev/replied-to/) * [Engagements](https://wordpress.org/support/users/tomcatwpdev/engagements/) * [Favorites](https://wordpress.org/support/users/tomcatwpdev/favorites/) Search replies: ## Forum Replies Created Viewing 8 replies - 1 through 8 (of 8 total) * Forum: [Developing with WordPress](https://wordpress.org/support/forum/wp-advanced/) In reply to: [shortcode from plugin causes The response is not a valid JSON response Error](https://wordpress.org/support/topic/shortcode-from-plugin-causes-the-response-is-not-a-valid-json-response-error/) * Thread Starter [tomcatwpdev](https://wordpress.org/support/users/tomcatwpdev/) * (@tomcatwpdev) * [5 years, 6 months ago](https://wordpress.org/support/topic/shortcode-from-plugin-causes-the-response-is-not-a-valid-json-response-error/#post-13670940) * Thank you so much [@catacaustic](https://wordpress.org/support/users/catacaustic/), I forgot this and I fixed it. * Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/) In reply to: [[W3 Total Cache] can not verify stackpath cdn API key](https://wordpress.org/support/topic/can-not-verify-stackpath-cdn-api-key/) * Thread Starter [tomcatwpdev](https://wordpress.org/support/users/tomcatwpdev/) * (@tomcatwpdev) * [5 years, 10 months ago](https://wordpress.org/support/topic/can-not-verify-stackpath-cdn-api-key/#post-13217085) * Hello [@vmarko](https://wordpress.org/support/users/vmarko/) , Your screenshot link is undefined. I checked “Resource Usage” in stackpath account and I think you are right ( 11MB / 1T ), my website and static files are being served from the CDN. I think after verifing CDN key, it will take a moment to send files from my server to stackpath automatically without any notification, so I didn’t recognize after your reply. After using Webpagetest to check again, I can see the result “Use a CDN for all static assets: 78/100”. I think it doesn’t get 100/100 because some missing images that you listed above and that is why Webpagetest change the icon of “Effective use of CDN” to green color. I will close this ticket, thank you for your help, if I have any problem, I will contact you soon. Have a nice day. * Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/) In reply to: [[W3 Total Cache] can not verify stackpath cdn API key](https://wordpress.org/support/topic/can-not-verify-stackpath-cdn-api-key/) * Thread Starter [tomcatwpdev](https://wordpress.org/support/users/tomcatwpdev/) * (@tomcatwpdev) * [5 years, 10 months ago](https://wordpress.org/support/topic/can-not-verify-stackpath-cdn-api-key/#post-13216852) * Sorry, Im not sure I totally understand about that option, but please [check this image](https://i.imgur.com/CNCf7nc.png). Is it ok? here is website URL: [https://mandaley.officience.com/](https://mandaley.officience.com/) * Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/) In reply to: [[W3 Total Cache] can not verify stackpath cdn API key](https://wordpress.org/support/topic/can-not-verify-stackpath-cdn-api-key/) * Thread Starter [tomcatwpdev](https://wordpress.org/support/users/tomcatwpdev/) * (@tomcatwpdev) * [5 years, 10 months ago](https://wordpress.org/support/topic/can-not-verify-stackpath-cdn-api-key/#post-13216769) * I just made a test to detect this issue, I have 1 domain and subdomain like this: 1. mydomain.com 2. test.mydomain.com/wptest When I verified API key on mydomain. com , it worked. But on test.mydomain.com/wptest, it gave error. So I changed subdomain to test.mydomain.com and w3tc now can verify CDN key. After that, I clicked on button “test stackpath” and it passed, but I use Gtmetrix or webpagetest to check one more time, both of 2 tools show me that, cdn is not effected, is it normal ? * Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/) In reply to: [[W3 Total Cache] can not verify stackpath cdn API key](https://wordpress.org/support/topic/can-not-verify-stackpath-cdn-api-key/) * Thread Starter [tomcatwpdev](https://wordpress.org/support/users/tomcatwpdev/) * (@tomcatwpdev) * [5 years, 10 months ago](https://wordpress.org/support/topic/can-not-verify-stackpath-cdn-api-key/#post-13216538) * Hello [@vmarko](https://wordpress.org/support/users/vmarko/) , thank you for your reply. I regenerated API key (stackpath) and followed the instructions that you gave me one more time. Unfortunatelly, I still got the error: Can’t authenticate: Failed to reach API endpoint (see this picture: [ Error appears when click “next” button ](https://i.imgur.com/JhF5cqn.png)). For more information, Im using lastest version of wordpress and w3tc, php 7.2. Other features of w3tc are still working well * Forum: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/) In reply to: [optimize plugin in admin area](https://wordpress.org/support/topic/optimize-plugin-in-admin-area/) * Thread Starter [tomcatwpdev](https://wordpress.org/support/users/tomcatwpdev/) * (@tomcatwpdev) * [5 years, 10 months ago](https://wordpress.org/support/topic/optimize-plugin-in-admin-area/#post-13203946) * thank you [@manufav15](https://wordpress.org/support/users/manufav15/) , I’ve already used php 7.3 (Im not sure that 7.4 will solve this problem). I know it hard to remove plugin’s scripts/css in admin area, we have to decide that install those plugins or not. In my case, maybe Ultimate Member(role management plugin), TinyMCE (more options for editor like WordPress classic editor) are not good choices. I wonder that CDN can solve this problem? * Forum: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/) In reply to: [optimize plugin in admin area](https://wordpress.org/support/topic/optimize-plugin-in-admin-area/) * Thread Starter [tomcatwpdev](https://wordpress.org/support/users/tomcatwpdev/) * (@tomcatwpdev) * [5 years, 10 months ago](https://wordpress.org/support/topic/optimize-plugin-in-admin-area/#post-13199863) * hi [@manufav15](https://wordpress.org/support/users/manufav15/) , sorry for my bad english 1. I have searched some posts about these plugins on google, and of course,they said these plugins can make admin area slow (ex: if use only wpml, it doesnt master, but when you use string translation and translation management( extension plugins of wpml), admin area will be slow ) 2. I dont need to active plugins one by one because I can open devtool to check which request takes too much time. (ex: ultimate member, itheme request) 3. I dont think viruses is problem( I checked it), the problem is when you log in to admin area, website will make a lot of plugin requests (no lazy load or remove unused scripts/css I want to know how to optimize these plugin (change setting, remove some unused functions,…) [this pictrue may explains](https://imgur.com/a/OosLFjt) * Forum: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/) In reply to: [Default category URL was not found on this server.](https://wordpress.org/support/topic/default-category-url-was-not-found-on-this-server/) * Thread Starter [tomcatwpdev](https://wordpress.org/support/users/tomcatwpdev/) * (@tomcatwpdev) * [5 years, 11 months ago](https://wordpress.org/support/topic/default-category-url-was-not-found-on-this-server/#post-13044689) * [@nagpai](https://wordpress.org/support/users/nagpai/) Thank you for your reply, Unfortunately, After migrating, I tried both clear cache (w3tc) and update permalink several times, but it was still not working Viewing 8 replies - 1 through 8 (of 8 total)