sometimes it can't spawn the horse

[NakiriAyamesuki]

sometimes it can't spawn the horse in GUI.
player don't have to do anything, and then they can spawn the horse again.
Ruled out Network problem
https://user-images.githubusercontent.com/56333360/131473660-aafa2211-ae31-49de-9379-8e2d666e5ed3.mp4

[NakiriAyamesuki]

Minecraft:1.16.5，PaperSpigot 1.16.5(Build 787)

[7rory768]

Can you please send the error in console

[NakiriAyamesuki]

there is no error messages in console...sry
Now there's a new issue.After a few days of working normally,the player suddenly looses control of the horse.They can't move the horse..

[NakiriAyamesuki]

latest.log
I got the error log
In [18:34:45]
rpghorses's database will not be able to save some playerdata.This causes the horses to disappear after they have owned them for a while.

[7rory768]

Can you please tell me the error line you're referring to? That log is absolutely flooded with errors from all kinds of plugins

[NakiriAyamesuki]

line 21388