Verify if in the account which you are logged in FiveM keymaster owns the script(s) you are trying to use. If the script is not there, it means you used a different account on Tebex, or you have transferred the script to another account
Example withJobs Creator script
If the account you are using in FiveM keymaster owns the script(s), you have to verify if the server key your server is using, it's generated by the same account
My server key is generated by someone else that's not me, what can I do?
You have 2 options:
Generate a key from your account and to use it
Transfer the script ownership to the other account
How to transfer the script to another account?
To transfer the script to another account, you can head to:
FiveM keymaster -> Purchased assets tab -> Transfer to another account red button
Note: cfx.re decided that the scripts can be transferred only 1 time, so you won't be able to transfer the script again
ZAP-Hosting server key
If you are using a Zap-Hosting server, you do not have to enter your server key in server.cfg, but directly in their website