Certain WoTLK guides inaccessible

[Deliro]

Today I logged into wow and certain leveling guides were grayed out and inaccessible. When I mouse over them it says "This guide is either missing or you're using the trial version." Which I am not. Troubleshooting attempted so far without success:

1) Repairing
2) Removing TBC/WoTLK content in the app and reinstalling it.
3) Deleting the Zygor folder in the Interface folder in WoW and instances of Zygor in WTF folder and reinstalling guides in-app
4) Disabling every other addon

All this done while the game was closed. The guides that I cannot access are:

Dragonblight
Grizzly Hills
Zul'Drak
Sholazar Basin
The Storm Peaks

I am able to access and run every other guide with no issue. The behavior is across all toons, not isolated to one.

I did update some addons today before running into this issue. These include:
Mapster
TomTom
Weak Auras
Auctionator
SexyMap
Tradeskill Master
Vendor Price
Pawn
Questie
Plater

[Deliro]

UPDATE - The "Featured" tab is the area that has grayed out guides. However I was able to access by going to the Home tab and going through the folders. Still a bug, but found a work around.

[Cleavis]

Same exact thing just happened to me. Your solution worked for me as well!