Whenever I try to create a Warlock character, only three of the Invocations are available. The Pact invocations are available at level 1. But a level beyond that, the options are limited to: Fiendish Vigor, Gaze of Two Minds, and Lesson of the First Ones. 

It looks like they've been miscategorized as Homebrew in the list. If you enable Homebrew on the Home tab, they show up again.

This same thing has happened with fighting style feats too. It looks like they may have made some attempt at allowing homebrew versions of these things, but introduced a pretty big bug into the existing stuff.

The Fighting Style thing seems to only affect the 2024 Paladin and 2024 Ranger classes. I was able to see it by just creating a character with one of those two classes, advancing it to level 2 where they get the Fighting Style feat, and looking at the drop-down. Enabling "Core Rules" allows the class-specific options (Blessed Warrior and Druidic Warrior) but to see the option to take a Fighting Style feat, you have to enable Homebrew. It then shows a secondary drop-down with the fighting style feats from the Core Rules.

2024 Fighter seems to be unaffected, possibly because it doesn't have a class-specific non-feat option the way those two do.