use expression do not work with Ubunta

[evetaell]

Hello!

Please, help me. I have Ubunta and renpy v. 7.1.3.
I have a mistake with my code.

Code: Select all

label start:
    show screen loc("test", "loc2")
    ''
    return

screen loc(tx, act):
    vbox:
        text tx
        use expression act

screen loc2():
    text "123"

Text mistake:

File "game/script.rpy", line 33: end of line expected.
use expression act

What problem with expression?