ExtendScripts broken in PS CC 2018

[FitzFoto]

An early 'heads-up', a number of my ExtendScripts that were working under PS CC 2015.5 and PS CC 2017 no longer work.  A number give inexplicable errors in the UI code.

I am investigating and will revert.

[FitzFoto]

Some UI commands that work in PS CC 2018 under Windows 10 are errored without explanation in PS CC 2018 under High Sierra ... so it looks like an app/os compatibility issue.

[FitzFoto · Accepted solution]

No errors were reported after a reboot.