1. Before installing Knowage, I've installed XAMPP. The installation process finished without any issue and configured correctly the database (It creates knowage_demo and foodmart_demo in my MariaDB/MySQL database). I can get into my DB at http://localhost/phpmyadmin/, additionally, I can get into Knowage at http://localhost:8080/knowage.
   My problem is when I want to add a new Data Source which is located in the same MariaDB/MySQL database:
   I Used:
   URL= jdbc:mysql://localhost/MyDataBase
   Driver= com.mysql.jdbc.Driver

   I also used:
   URL= jdbc:mysql://localhost:3306/MyDataBase
   Driver= com.mysql.jdbc.Driver

   But always says:
   "Error

   Connection Test failed, please look for more details in log file and check Your parameters"

I am using mySQL 8.0.16. jdbc:mysql://localhost:3306 worked for me.

The used account needs to have Authentication Type: Standard (caching_sha2_password doesn't seem to work).

Good luck!

Edit: After installation completion, I get a "HTTP Status 500 - The server encountered an internal error that prevented it from fulfilling this request. " from Apache Tomcat. Is mySQL 8 incompatible?