1.12.2 Gui doesn't open properly

[ChAoS_UnItY]

When I clicked my TileEntity (TicketVendor), it should open Gui, and it should be closed on pressing escape or E, but my problem is after clicking, it shows for a moment and disappear without any messages.

Github : https://github.com/KyleLin921021/EkiMod/tree/master/src/main/java/chaos/mod 

Note : Currently the Gui stuff is in building phase, so some stuff is saved for future usage.

[Ugdhar]

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