I think it just happened with the last update 
Hi Jose_Manuel,
To investigate this case we need more details. Could you please click on the “info” button at the “Connect to Server” window then copy the command and execute it via the Command Prompt to check if you get an error message?
Sorry for the inconvenience.
After reinstalling MariaDB the problem was solved.
Thanks
Hi Jose_Manuel,
Good news! Please feel free to contact us on any issues or concerns.