Sudden ERR_HTTP2_PROTOCOL_ERROR on every js and css files

Hi everyone !

I recently went on my website which is online since more than 5 years now and realized that none of the css and js files were loading. By looking into the console, I’ve seen that every load fails because of a ERR_HTTP2_PROTOCOL_ERROR. And when i try to open whichever file that is supposed to be loaded, I have the same error as well and nothing loads.

An even stranger thing is that it seems that this only appears on laptop, either mac or windows as I tested the two, everytime in different browsers, but it works as normal on every mobile phones, on every browsers. Isn’t it a nonsense ?

For info, I had recently done some litespeed settings changes but now i purged all the cache, put the settings back to normal and re purged all but nothing. When I try to go to the Really Simple SSL plugin I can’t do anything cause it is greyed, as the admin panel also has some css problems. So I don’t know if it is clearly the plugins that messes it up but because it is a SSL problem I prefer to ask you !

Thanks in advance !

Regards

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