What's going on here? See the image below: I...

[Michael2]

What’s going on here?

See the image below: I am using an expression as shown (inserted from) the expression builder yet the expression tester states that it is an invalid expression.

[Steven_Coile]

It’s trying to interpret your input as an expression, but you want it to interpret the input as a literal text value. Wrap it in quotes:

“#view=Corridor%20Mowing”