Ri Quartz overrides the CSS that Max Mega Menu outputs. This effectively means the theme hijacks control of some aspects of the menu from Max Mega Menu. You will, for example, find it is impossible to change some theme options such as font colors and the menu height.
For this reason, we do not support issues that arise when using Max Mega Menu or Max Mega Menu Pro with Ri Quartz. Please direct any support issues to the theme authors.
If you have bought Max Mega Menu Pro to use with Ri Quartz, and are running into compatibility issues, please get in touch and we will be happy to offer a refund.