Cant Open project

Hi Ashley

I get the following errors when i try and open my .c3p file

e_Login, event 4, action 6: Invalid expression: 'Sign' is not a function in this project

e_Login, event 6, action 5: Invalid expression: 'Sign' is not a function in this project

- I am not sure what to do - is there any way I can fix this myself?

Is it a Construct 2 project? 'sign' is a system expression that was added in Construct 3, so if something in C2 uses the name 'sign' it needs to be renamed to something else first.