Adjustment BG stage can't adjustment

[Belno Light]

I create a zoom stage and trying to test it but it appears a pink BG stage at the top.

 

Spoiler

https://imgur.com/7UnopyM

 

I try to adjust it many times but still can't, btw I using zero gouki escape stage by Rugal2
Also in [Camera] section here.

 

Spoiler

https://imgur.com/IQyYdoF

in boundhigh section I adjusted and testing the stage many times but can't adjust at all is any way to fix the error?
please help.