Generating Exception in Console while coming in a world with a frame

[SimonMage]

This is the link of error in console;
(https://mcpaste.io/e6dc789fcecefd40)

Just this, the plugin works but it has this error in console; Minecraft 1.16.5 Java 11 (obligated) ; started with Spigot Arclight

[InventivetalentDev]

what version of MapManager & AnimatedFrames are you using?

[SimonMage]

I'm using AnimatedFrames_v4.13.5-SNAPSHOT.jar for 1.16.5
and MapManager_v1.8.0-SNAPSHOT.jar for 1.16.5