Hi, I have the same issue. WebP Express 0.17.2 on LiteSpeed with mod_headers gives the same warning. It’s a multisite install, and the plugin is network-active if that’s relevant.
I’ll try the solution you provided but it’d be nice to not have to muck around in .htaccess by hand ?? If you’d like more info about my environment/config, please let me know!
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This reply was modified 5 years, 1 month ago by uryga.