However, we've outlined how to diagnose, and more importantly how to fix, a common W3 Total Cache error experienced by WordPress users. Here's a (potential) way to fix it. Home» Blog» Troubleshooting» Solved: W3 Total Cache Error When Updating Posts/Pages/Options. Hello,. I installed W3 Total Cache plugin a couple of days ago. Today I could not log in to my wp-admin. I was finding out what was the issue. Today I used the automated plug-in installer to install W3 Total Cache which resulted in my page doing nothing but spitting out a nasty error. I've managed to fix the problem so I thought I'd put it here in case it is of use to anyone else. When Wordpress transferred my Wordpress site. In general, once setup, W3 Total Cache can be left to cache WordPress blog Trial and error works best for establishing the best cache plugin for your site. If you use W3 Total Cache, you may get the following error on your plugins page: How I Changed my WordPress Website from HTTP to HTTPS (FREE SSL. Here are some fixes for common W3 Total Cache error notifications. W3 Total Cache minify may break WordPress plugins, themes or your ability to even log. Page speed is important for a better user experience and also for SEO. In WordPress, there are many cache plugins available. But out of all of them, WP Super.