Why my game keeps crashing in GUI text set?

So, i have an entity with tick update procedure that increases a value by 1 after 100 ticks:

https://imgur.com/a/VZew8mt

But when i update this value in GUI textfield via procedure:

https://imgur.com/a/Ymx371w

After a few seconds while GUI is opened the game simple crashes.

Here some of the log:

[16:35:15] [Render thread/ERROR] [ne.mi.ev.EventBus/EVENTBUS]: Exception caught during firing event: Cannot invoke "net.minecraft.world.entity.Entity.getPersistentData()" because the return value of "java.util.Optional.orElse(Object)" is null
Index: 1
Listeners:
0: NORMAL

Can anyone help me?