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Hi since the last WP update, I have had the same problem with the Admin CSS in a couple of sites, the admin menu sometimes shows like this, I tried to refresh the browser cache and the plugins cache, not work, then sometimes it fixes by itself after a while, I checked the network tab and I notice an error and it said the server could not load a file, but after a while it does, could someone explain to me how to fix this.
I had different plugins in each website so it doesn’t look like something about the plugins.
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