I installed AweBuilder and MD Megamenu but when I tried to enable them I got the following error: Fatal error: Cannot redeclare md_arg() (previously declared in /var/www/html/modules/awe_builder/awe_builder.module:34) in /var/www/html/modules/md_megamenu/md_megamenu.module on line 33. 

They then showed up checked as installed, but didn't work. I uninstalled both and then tried just enabling AweContent first. That seemed to work. However, when I tried to then enable MD Megamenu I got the same error as before. So it is an issue with the MD Megamenu module. Please advise.