On run UI Builder advises that 'goto' in 'router' section of UI builder is no longer supported

UI Builder
1

app id - A20959C8-58A0-45C4-BEEE-FF108415524A

Hi, on run UI Builder suggests that I use an alternative to ‘goto’ in the ‘router’ section. I can’t find the suggested alternative.
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Cheers

2

Hi, I copied and pasted a ‘goto’ block. That was the one that threw the problem. BUT, if I take a fresh ‘block’ no errors are reported. So I think that the problem is fixed!