When you type /summon and hit tab you get a list of things you can summon. There is also an option to spawn a ocelot, but it says "Ozelot". A clear typo.
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Please ignore the first half of Blah's comment.
This is not an issue with resource packs, there is an issue with the ocelot entity id being spelled incorrectly, and fixing it would remove all ocelots and tamed cats from existing worlds, therefor this will not be fixed.
Broken resource pack. Please switch to the default resource pack, and see if it occurs there.
Otherwise, this is a duplicate of MC-30994