Try adding an equal sign:
[register redirect_page=”https://mancms.bicoder.com/”%5D
I had the same problem this morning.
The problem is the developers don’t have *ANY* written examples *ANYWHERE* of redirect_page in use for beginners.
They only have the “Part 2” video which is so low-res and blurry it alternately looks like:
redirect_page “http
redirect_page-“http
or even
redirect_page?”http