Adnan Haque (a11n)

Hi!

The cache pages expire after an hour and they should be garbage collected by the plugin automatically. Is this not happening in your case? Can you make sure cron jobs are running in your site correctly?

You might also be able to debug the garbage collection by enabling debug logs under cache settings. You might have to wait for a few hours to see anything related to the garbage collection show up in the logs.

Hi there!

Please share the URL of the site, what error you are facing and any other relevant details. We will try to help you solve this issue.

Hi!

This sounds like a firewall is blocking the Critical CSS generation process because the critical CSS generator needs to go through many of your pages in a short amount of time. Please disable any firewall/rate limiting while you are generating the Critical CSS.

If you are using Cloud Flare, you might need to disable the rate-limit there. If you still can’t find it, your host might be able to help.

Let us know how it goes.

Hi,

Could you please try excluding the -css suffix? So the exclude list would look like: “tatsu_theme, tatsu_css, tatsu_icons”.

Let us know if that works!

Hi there!

It looks like your site is not connected to Jetpack and so I am unable to take a closer look. A timeout error appears when it takes too long to load the page, and it gives up. Usually, a 404 error page would not be used by the critical CSS generator in the first place. Could there be any other page redirecting to this page?

Hi!

Thank you for reaching out and for your interest in Jetpack Boost!

Boost includes a robust caching module and an image CDN that optimizes images for faster load times. With these features built-in, using additional caching or image optimization plugins should be unnecessary.

Hi @keithkhl,

This seems to be the correct way to do it. It should also apply to profile images. But, quality might not be the only reason for the images to be pixelated. It can be also caused by the image width and height. So, please check those as well. Does the pixelation go away if you disable the feature?

Thanks for sharing the screenshot. Seems like there is a bug in Boost that skips parts of minification. We will work on a fix to address that.

While minification will be better when we fix this, please note that you should continue to use minification now since this still helps your site regardless of the warnings.

This is the issue in case you want to keep track of the progress: https://github.com/Automattic/jetpack/issues/34201

Hi @devin104!

I checked your site and your scripts seem to be minified already. Could it be a false alarm?

Please post a screenshot of the rankmath message so we have more context.

Hi @directforpets !

Assuming your site is directforpets.com, I see that some of the pages behave in an unexpected way if boost query parameters are present. For example, https://directforpets.com/?jb-generate-critical-css=1695320981829 should show the homepage. However, it doesn’t recognize that it is for the homepage. Aside from that, some of the pages(e.g., shop pages) load very slowly which can result in timeouts. Please try to address these issues and Boost should work.

There may be interfearence from your theme or any of the other plugins. The best way to determine if something is interfering is to test for a theme or plugin conflict. You can do that by following these steps:

1. Temporarily deactivate all plugins except Jetpack Boost, and clear your browser’s cache.
2. Then, try generating critical CSS again. If it is successful, then you know another plugin is conflicting here.
3. You can reactivate plugins one by one, checking generating critical CSS after each one to discover which plugin is causing the problem.
4. You can leave that plugin deactivated and/or contact whoever makes that plugin for help resolving the issue it’s causing.

If deactivating plugins doesn’t help, it may be your theme.

1. Temporarily activate a default WordPress theme like Twenty Twenty-One.
2. Then, try generating critical CSS again. If it is successful, then you know it’s a problem with the theme. You can contact whoever makes the theme for help resolving the issue it’s causing.

You can see these theme troubleshooting steps in detail in our Troubleshooting manually guide.

Hi Nazim,

What version of the plugin are you using? Please share the URL of your site so we can take a look.

Hello again!

It seems like your site is still only generating one critical CSS file and timing out for the rest. This is likely a firewall or hosting limitation.

The critical CSS generator needs to load several pages of your site. This may be triggering a page load limit set by a firewall, or exhausting the resources available from your host.

From here I would recommend two things.

1. Try disabling other plugins for testing purposes and see if you can generate critical CSS and the health check goes away. If this is successful, a plugin is limiting the requests. Try to find out which plugin is causing it.
2. Contact your hosting provider and explain this issue. Mention that you need to load several pages subsequently without cache.

Hi @sarita23, We have recently shipped Jetpack Boost 2.0.2 with a fix for critical CSS generation issues. I noticed that your site is currently serving critical CSS, so I assume the update worked for you and marking this thread as resolved. However, if you still face this issue, please reply with the errors you see when critical CSS generation fails.

Hey @ildomandatore, you can use Concatenate CSS and Concatenate JS features in Jetpack Boost to minify the files.

Unfortunately, Jetpack Boost cannot help optimize ads at the moment.

I hope this helps.

Hey @kramerpm! It looks like the server sometimes throw a 500 error causing the critical CSS generation to fail. Please contact your host to find out what may be causing them.

If you would like to reply, please open a separate thread so we can focus on your issue.