I had the same “issue”. I read “healing potion” and thought that any of them would do. Not wanting to waste the good ones, I used minor potions. Nope.
You have to specifically use the ones labeled only “healing potion”
NOT minor healing potion
NOT potent healing potion
NOT super healing potion
Just plain old healing potion
The other ones will not work
Seems like a stupid minor issue, but it’s one that threw many of us off. Could be easily fixed by renaming it to something like “average”, “medium”, or “regular” healing potion.