Blank page when post contains embed youtube video

Hello @daniub

unfortunately I can’t provide a link because it’s a client’s website and I prefer not to share it here.

in any case, there wouldn’t be much to see because as I said the page’s html is completely empty.

the page loads normally if I remove the embedded video or if I check “disable Complianz on this page”.

I also can’t see any error in the server logs. The page seems to load correctly on server side, but then it’s emptied on the client side.

I tried with different videos and the result is the same. The video url is just pasted in the post editor and the embed code is generated by wp in the default way. The only thing a bit peculiar maybe is that we’re using the classic editor rather than Gutenberg.

I didn’t try to disable the integration with Youtube from the Wizard because if possible I would like to keep it so that youtube cookies are eventually blocked. I assume that if I disable the integration then when someone clicks to reject all cookies complianz won’t really block youtube’s, would it?

Hello @daniub

ok I have traced back the problem and I’ve figured out that it’s caused by Complianz logic to generate the image placeholder for the video.

in particular it’s the function cmplz_create_webp() when it’s triggered by this bit of code at line 1798 of the file functions.php in your plugin’s root folder:

Within that function it then tries to save the newly generated file:

and at that point it uses WP_Image_Editor workflow and ends up crashing when it fires the method make_image(). I don’t know why but it seems that it crashes as soon as it fires ob_start()

I am not sure why it would happen, but for reference we use an S3 bucket as CDN for media, integrated using the plugin “humanmade/s3-uploads”, and we have image GD on the server.

though we don’t have problems with images or attachments when within normal workflows. In fact, if I comment out that bit of code from the first screenshot, the page loads normally and it also shows a placeholder correctly generated from the video. I mean that it’s not a default/general image, it’s a screenshot from the video itself. It’s just a jpg rather than a webp.

At this point I am wondering if you could just add a filter within that first conditional, so we can eventually skip that logic. Something like:

if ( file_exists( $file ) && apply_filters( 'cmplz_video_placeholder_convert_to_webp', true ) ) {