Simple RAW for 5e V: The Disadvantage Strikes Back

[Galithar]

Q23 I rage and dodge. Next round I attack a cleric. She has sanctuary up. I fail. There's no other targets so my attack is lost. Do I lose my rage?

A23
Unless you have taken damage, or have another feature that would prevent it's loss, yes you would stop raging at the end of the turn in which you made no attack.