Can't use horse and mounts

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Hello community! I have a trouble with vanilla core

I can't use horse and mounts. When i try cause horse using that item chat give me error:

 

When i want use Ctrl + B:

 

 

It's a first problem. Second - mounts.

 

I can ride a mounts using /mount_test 20110 but can't use neither nor nor . But i can wear some that items like item shop items, but without effect:

 

I tried to create quest following that guide. Red color is a folders created by me:

/usr/home/game/share/locale/germany/quest/object/71114/use

 

 

Here i created file with name mount.start where past:

when 71114.use begin
if pc.is_riding() then
         syschat("You can't take off the mount when you are riding.")
elseif pc.is_polymorphed() then
         syschat("You can't take off the mount when you are polymorphed.")
else
             pc.mount(20110, 600)
             pc.mount_bonus(apply.DEF_GRADE_BONUS,75,600)
end
        end

 

 

After that i typed in game /reload q and server gives me error

 

cannot find quest index for mount

 

 

after python make.py the folder that i created did removed.

 

Who can help me with solving?