[Plugin: WP-HTML-Compression] Error message after activation

I receive the same error. No response to your post in 2 weeks, so it looks like the plugin author isn’t too concerned about this. That’s unfortunate.

I received the same error. Fortunately, this error occurred only when I click the “activate” link just after the installation. So, basically, by going back to the “Installed Plugins” and activating from there, worked for me.

Disclaimer: I don’t use BB.

i dont receive any error but it conflict with facebook comment, facebook like. how do i resolve the problem?

Hi Bayou,

You may create a new topic for your specific query to get it noticed by others. Since this topic already got replies, your query may not get enough attention.

I have not encountered this issue.

Does this help?:
https://smartmediapro.com/blog/tips-and-guides/wordpress-error-plugin-does-not-have-a-valid-header/

Fixed in v0.5.3