I was trying to open an adventure that has been shared with me, but when I go to the adventure and look at the content I am taken to purchase the adventure. It has been my experience previously that the adventure would open the content that has been shared. 

Adventure: Waterdeep Dragon Heist

I have ensured the content is shared with me, and my entitlements are properly in sync. The sharer and I both have Master Tier subscriptions.

Any help would be most appreciated.

Make sure that:

• The person who actually owns the adventure has their entitlements synced as well
• You actually have a character in the campaign where they're sharing it
• Content sharing is actually enabled in this campaign, and the person who enabled it isn't over their limit
• The campaign's DM hasn't turned off sharing for that specific book on the Content Management screen for the campaign

Thanks, I'll check all that out.