Is it me or my computer, cannot heal my pets

I have changed to different charcter an reboot. Why am I not able to heal my pet during a battle, or anytime?
It says, “you have an active summon already”, what is that mean.?
Is that part of the game now, or a bug?

What pets are you referring to?

https://worldofwarcraft.blizzard.com/en-us/character/us/hellscream/bendarsoho/collections/stable

Or…

https://worldofwarcraft.blizzard.com/en-us/character/us/hellscream/bendarsoho/collections/pets

One is a heal spell in your spell book under: Beast Master and the other is for the Battle pet journal page.

I am a Beast Master. My pets assist in the fight. I can heal them during the fight usually. But now reciently I cannot, and that message show up that I have an “acdtive summon already”. I dont know what the is , Active Summon. ?

Can you try to tame just any random beast. Then try to heal them.
The pet you have.
"SKOLL Like all spirit beasts, he requires the E.Ability hunter talent to tame, but also can not be used with the marksman or SV spec
Has special ability ; that might be messing with the normal healing for a hunter.

On my. 17 Unreturn-Eonar … Water strider
pet. The icon for healing … Relieve pet states the error, but “mend pet”, works.

double check your heal, you get that error when trying to revive with an active pet, or trying to summon a new pet with one already out. the revive button used to change to the heal button when you summoned a pet, but it isn’t anymore in 10.2 i think it’s a bug