You may have incurred in a similar message:

This may happen because you downloaded the “recommended version” of Fx Artifacts.

To fix this you simply need to use the latest artifact available instead like this:

You may have incurred in a similar message:

This error may be caused by a wrong mySQL string in your server.cfg file and/or your connection to the database is not working.

The following steps may help you solve the problem:

• Check if your MySQL String in your server.cfg file is correct and correctly formatted: check OxMySQL documentation for more instructions.
• Check if your database connection is working, use the Install guide to make sure your database is up and running

You may have received a similar message:

This error may have been caused from an incorrect update to the new ESX Object methods.

If the error come from an Official ESX resource then please update your resource to the latest available.

If the error comes from a community made resource then:

• Look for an ESX = nil in your files and remove it if present
• Follow the Updating Tutorial for further information.