Technical Missing Summon Warhorse spell on Paladin

[Barbirolik]

My paladin (name: Berrsserkk, level 25, realm: Icecrown) did not receive the Summon Warhorse spell after reaching level 20. The trainer shows the spell but I cannot learn it.
Could you please fix this? Thank you very much!

[Findrin]

Can send screenshot please? (For the trainer's frame)

[Barbirolik]

https://imgur.com/a/hS8ENmN

[Shred]

That means you already know the spell.

[Barbirolik]

where? https://imgur.com/a/ncZo3li

[Barbirolik]

where??? https://imgur.com/a/OcaeGFs

[Barbirolik]

Oh, sorry, I showed you the wrong one :D https://imgur.com/a/JHD3WFr

[Findrin]

The spell is in mount's window not in spellbook :D
https://imgur.com/a/fTAXv1g

[Barbirolik]

Xddddddddddddddd thank you <33333333333333