The curious case of the missing airplay icon

Hello everyone,

last night I noticed that the airplay icon was missing on my iPad. I didn't show up in videos, music or youtube.
When I turned on my iMac I saw that the icon was also missing in iTunes. The only thing I did yesterday was to connect my iPad to my iMac to sync iTunes.

I didn't do anything else really. That's why I figured it might be a good idea to update iTunes. Everything else is pretty much up to date and works fine. Also checked my router and wifi settings and couldn't detect anything out of the ordinary. Basically did everything people advised on the web. Resetting AppleTV didn't help either.

So right now I cannot mirror anything via AppleTV because the airplay symbol is missing on my iOS device as well as on my Mac. You probably know how much that s****. Does anyone have the same issues with airplay? Can anyone help me? I would really appreciate it!

Take care!