what does this ZP error mean?

[zenewbie]

I am randomly getting this error now, it is not repeatable though, if I run the project again I don't get it, it's totally random:

"Running the logical IF-statement Result: undefined"

never had this error before and didn't change anything in my project.

 

[VladZen]

Looks like your IF cube is empty... there is no expression

 

[zenewbie]

I don't actually have a specific "if" cube, it's just trying to get some element from the page. It's always the same cubes and it works 95% of the time, the rest of the 5% I get this error out of nowhere.

 

[VladZen]

I don't actually have a specific "if" cube, it's just trying to get some element from the page. It's always the same cubes and it works 95% of the time, the rest of the 5% I get this error out of nowhere.

Please attach screenshot of the error and program at this moment.