Cannot spectate friends after recent patch

[StrikeX-2315]

Tried reinstalling but still won’t let me spectate friends while we have not change settings… Need it for quest and fun with friends please need help.

[Rhasimir-1573]

Hearthstone Common Issues

Here are some of the commonly reported issues that can be resolved. Unable to use specific cards in Adventure Missions Certain card effects are disabled while in Adventure Missions. This is to prevent them from trivializing all of the encounters. Some examples include: Mindbreaker Sideshow Spelleater Grizzled Wizard Golden Cards are not animating on mobile? After installing the Hearthstone app, mobile devices will need to download additional files which contains extra sounds and animatio…

The section on “challenge a friend” also applies to spectating:

Unable to challenge a friend on mobile?
If you are unable to duel a friend from your friends list, you will need to wait until both players are on the same patch.

So, just wait until the patch is available across all platforms. Should not take more than a couple of days.