Mod crashes when loading umc renderer on SETUP in 1.16.x

Error:

[23:11:36] [Worker-Main-14/INFO] [ca.mo.ModCore/]: Preparing Filler..
FATAL ERROR in native method: Thread[Worker-Main-14,5,main]: No context is current or a function that is not available in the current context was called. The JVM will abort execution.
at org.lwjgl.opengl.GL11C.nglGetIntegerv(Native Method)
at org.lwjgl.opengl.GL11C.glGetInteger(GL11C.java:852)
at org.lwjgl.opengl.GL11.glGetInteger(GL11.java:2673)
at cam72cam.mod.render.obj.OBJTextureSheet.(OBJTextureSheet.java:111)
at cam72cam.mod.render.obj.OBJRender.(OBJRender.java:36)
at cam72cam.mod.render.obj.OBJRender.(OBJRender.java:27)
at cam72cam.mod.render.obj.OBJRender.(OBJRender.java:23)
at net.landofrails.stellwand.content.entities.storage.BlockFillerStorageEntity.prepare(BlockFillerStorageEntity.java:62)
at net.landofrails.stellwand.Stellwand.clientEvent(Stellwand.java:69)

done