Error in Appian RPA Configurator

I am trying to create an RPA using APPIAN RPA Configurator, in the Maven settings, I get the error:

This step checks if the Maven settings.xml configuration file exists and has the required configuration.

Appian RPA Configurator can create or edit this file for you.

Note: If you continue with this step, Appian RPA Configurator will create or add the required configuration to your settings.xml file

When I go ahead and add the user, URL to the repository and the Maven key, another error pops up and returns me to the same screen with the previous error in red.