I just bought Explorer's Guide to Wildemount (Spell Bundle). But I cannot prepare or equip them in anyway. is there a known fix for this Issue? And thanks for any help in advance

I  have it activated among  other things.

All the spells in the bundle are only learnable by a wizard of the chronurgy or graviturgy subclasses from that same book. If you're not trying to apply the spells to one of those two subclasses, you won't see them. However, if you go into the homebrew tools, and click 'Create Spell,' you can create a copy (from the spell dropdown start typing in the name of one of the spells, like Dark Star, then select it) and in the 'basic information' section change 'available for class(es)' section to include whatever class your character is. Then the homebrew version should be available, as long as you have homebrew turned on in the character sheet.

This was fixed for the death cleric at least. Can we get a fix for Pact of Tomb Warlocks? 

Yes, it was fixed for death clerics because the wording there is "one necromancy cantrip of his or her choice from any spell list." But the wording on Pact of the Tome and Book of Ancient Secrets is "from any class’s spell list." That wording specifies class's spell list, and the dunamancy spells aren't part of the wizard class spell list.

I would have never caught that difference. You think that’s intended? What other spell lists are there besides class spell lists? The intent is that bards couldn’t take this with magical secrets too? But the death cleric can? That seems extremely RAW! Ah well. Thanks for the clarification.

edit: I may go the homebrew route. 

I'm pretty sure before EGtW there were only class lists (subclass spells are not referred to as lists) as far as I can tell; I honestly think that the Death Cleric exception is down to lazy wording when writing it up -- at the time it wouldn't have made a difference, so no need to get specific. The intent really comes from the EGtW worldbuilding that dunamancy is super new and rare, so it's only available to the people actively developing it. But there's no reason a bard couldn't learn it (technically wristpocket, in its original form, was a cantrip used by a bard PC). But to keep to the technical RAW restrictions of chronurgists and graviturgists only, this is how DDB implemented it -- not on any class list. It means if you want to use it outside those bounds, it has to be really intentional, via homebrew. I'd love it if there was an 'ignore dunamancy restrictions' slider in the preferences, but I'm not holding my breath.