Should she say אני עייפה?
Technically it should have been the guy saying this sentence, not sure what happened there.
They said it already - the speakers were so tired. No power left to exchange papers. :-)
Ani lo etkaleach¹ hayom, ani ayef.
¹also written as: etkalach on Pealim.com
“I’m not gonna shower today, I am tired” wasn’t accepted. I wish Duolingo would be more accepting of more casual, real ways people say things. Would be an improvement.