Error from Companion: error: unrecognized method. (irritants: setLeft)

[Susie_Lee]

Error from Companion: error: unrecognized method. (irritants: setLeft)

I get this error can you help me?

These are the blocks!

[Peter]

Error from Companion: error: unrecognized method. (irritants: setLeft)

I'm trying to make a calculator but I keep getting the notification that I set "left" into something wrong. anybody know what it is and how to fix it? I've tried switching all text to the left but it didn't work.