Error message white balance

Hi all,

I am working with the zeiss microscop and ZEN 2.5 pro programm. I currently have problems with the white balance adjustment and the error message “Set White Balance Interactive (Axio Cam MR Rev3): Image red channel overexposed” appears when I want to use the function “Auto” white balance or “Pick…” white balance . Does anyone know how to fix this problem? Images are attached.

Thanks for your help!