Error: 'function' object has no attribute 'isAborted'

Haven't used SikuliX in a while, and now I can't get the simplest of scripts working. E.g.
def runner():
    hover(Pattern("1577027211309.png").targetOffset(-81,89))
runner()

Throws the following error:
[error] script [ test ] stopped with error in line 3
[error] AttributeError ( 'function' object has no attribute 'isAborted' )
[error] --- Traceback --- error source first
line: module ( function ) statement
3: main ( <module> ) runner()
[error] --- Traceback --- end --------------

Using Windows 10, behavior is the same with the current stable 2.0.1 and the nightly 2.1.0 version.