Problemas com LAUNCHER e MAIN Android

Estou tentando compilar um projeto no Android Studio e estou tendo o seguinte erro:


$ adb shell am start -D -n "br.com.vicaumartins.conectasd/br.com.vicaumartins.conectasd.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Unexpected error while executing: am start -D -n "br.com.vicaumartins.conectasd/br.com.vicaumartins.conectasd.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Error while Launching activity