So, following the advice on this SO post (sorry, I would comment there expect I don't have enough reputation)
Gradle: FAILURE: Could not determine which tasks to execute
I removed the tags from my .iml files, which allows me to compile. But when I go to run the .apk on a device, I get the error
"Error running TestProject: No Android facet found for TestProject"
Can someone help please, just want to get back to writing Android apps!