the audio is quite screwed up. to add more, sometimes the recording is different from PC version to mobile version (i use PC here).
Anyway.... the proper pronunciation for this should be: ar-ruTúbatu 3áliyatun al-yawm.
To be precise: 3áliyatun-L-yawm ; The "a" of (AL-yawm) here is somewhat like a schwa or a slight (a) sound not noticeable when spoken
usually in our everyday writing we don't use the Harakat or the vowel markers. Both words are the same but we are used to type and write without them on an advanced level. If Duolingo is considering the answer wrong for not using them, well, maybe you can report it though i don't think much will be done about it.