customVariable1 for conditionnel group not working

Describe the bug
A use the customVariables to use in the conditional groups, but I no longer works, yet it used to.
I have this code, and it was working well.

tell application "BetterTouchTool"
    set_persistent_string_variable "customVariable1" to "CONTROL_STRIP_MEDIUM"
end tell

It just shows the variable as empty.

I also tried it in Javascript, just for sure. Did not work.

Device information:

  • Type of Mac: MacBook Pro (13-inch, 2017, Four Thunderbolt 3 Ports)
  • macOS version: macOS Mojave version 10.14 (18A389)
  • BetterTouchTool version: 2.717