I have purchased the Dungeon Masters core rule book but don't have access to the Sword of Vengeance or it's child variations on any character sheets. Any one else experiencing this issue?

Can you access this: https://www.dndbeyond.com/magic-items/5505-sword-of-vengeance

 Note that "Sword of Vengeance" isn't in the inventory.

• Glaive of Vengeance
• Greatsword of Vengeance
• Longsword of Vengeance
• Rapier of Vengeance
• Scimitar of Vengeance
• Shortsword of Vengeance

Yeah I can access the article about it, but none of the weapons associated with it as you listed, appear in the inventory to be added.

What are your character's "Sources" set to in the Character Preferences?  I can only get the entry to go away if both the Core Rules and the 2014 Core Rules are turned off.

I have all sources turned on and it wont appear.

Also if I try to copy it in the homebrew I get a 403 Forbidden error: "As you try to enter the 403rd level of the endless dungeon, the ancient dragon Rylzrayrth rises up to block your path. The dragon has forbidden you from traveling any further."

This only seems to affect this one weapon type from the DM Guide. I can add "Enspelled" or "of Warning" weapons and copy them in homebrew without issues. Just "Of Vengeance" seems to be broken.