Sorry to hear that you have some issues. The “You lack the required entitlement to use resource x” problem is relatively common, FiveM themselves describe how to fix it here. In essence, the tell you to do the following:
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Try restarting your server.
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Make sure your server license key is correct.
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Make sure you are using the right account, if you bought the resource on the wrong account, you can transfer it to another account on keymaster.
I hope some of this helps.
Cheers,
Mads