Describe what the bug is in your own words.]
The Dark/The Light - Hex-Sealed Fusion lets you substitute this card for any 1 Fusion Material Monster, by Tributing the Fusion Material Monsters on the field, including it to Special Summon 1 corresponding DARK/LIGHT Fusion Monster from your Extra Deck. I have all the requirements but the game does not allow me to activate The Dark/The Light - Hex-Sealed Fusion effect.
Bug reproduction steps
Write the exact steps to reproduce the bug. Provide a replay code if you can. You can attach replay codes, or use a pastebin link or you can even use a spoiler tag using]
your replay code
Screenshot OR error code
Tell us what should have happened when the bug occurred.]
It was working before!
What OS are you using
Windows-10 / Linux / Android]
Online or Offline?
Additionally, please specify which monsters you are trying to use as materials and which monster you are trying to make.