ALS 4 Camera system drives me nuts, need help with the Set View Target with Blend

I try to add a camera that I can move to for cinematic effect with ALS but using Set View Target with Blend node and a spawn camera. Unfortunately, I get black bars on the side when I apply the node. How can I avoid that?

check that video for more detail:

Note: You can test the blueprint by adding it to the ALS_AnimMan_Character: