Can't allocate spirit to Blasphemy for Demon Form

Without my main hand and offhand equipped I have 60 Spirit and +36 from my necklace, total 96

I got to Blasphemy to allocated spirit, I go to the third tab for demon form, I have 96 Spirit, Blasphemy with Despair costs 60 and I have 96, but it says "Skill is not valid for this Weapon Set."

Why? I see people using Blasphemy in demon form, what is going on?

Same. I have plenty of spirit, even removed weps to confirm, and still cannot enter Demon Form with Blasphemy equipped. I tried putting Blasphemy on 2nd wep set which is just empty slots, and still can't.

Very frustrating.

I've found that it will bug if you put any spirit using abilities on Demon Form itself. Also on controller you need to set the spirit abilities to be the same for both weapon sets (even if you're not using a second weapon set) or it won't work. Also to get the demon dog to summon I had to exit to menu, change to mouse/keyboard, enable the dog in the different spirit menu, then switched back to controller and it worked

Hi Nauct#4324, I'm on controller and the solution to equip spirit using skills on both weapon sets worked for me. Thank you! Cheers.

its not working for me. I have blasphemy and enfeeble(lvl 6) and its not allocating the spirit correctly. I have tested it with controller and mouse, keyboard and its bugging out.