Error 403 when change “Page Optimization” settings

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Hi

I bought a shared hosting from namecheap and installed wordpress. I have not made any settings except the main WordPress settings (such as Permalink) and I have not installed any plugins (such as firewall, etc.) My host webserver is also LiteSpeed.

The LiteSpeed cache plugin is the first plugin I installed, but when I make any changes in the Page Optimization section, I encounter this error:

403 Forbidden
Access to this resource on the server is denied!

I checked all the permissions in my host’s file manager. All permissions were correct. But I don’t know why this problem occurs!
There is also an interesting point. When I do something through the Presets section and apply a preset, it is applied correctly and the settings in the Page Optimization section are also changed!
This problem has been driving me crazy for three days.
please guide me.
Best regards

 

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