Issue with DatabaseLink in Wolfram Cloud for external databases

I’m trying to use FormFunction to Upload data to a MySQL Database.

After some debug, I believe the problem is that JDBC is not working with external database in Wolfram Cloud as can be checked in the print bellow.

Am I doing something wrong? Or this is a cloud limitation for connections with external databases?

The code works fine in my desktop Mathematica, and the database don’t have any IP restriction.