Unable to start multiple tool prints

[Gozania]

Cant start a mutil tool print when spools selected.
Start Print button stays greyed out when both spools selected with plenty of material left in both spools. Unable to start print with plugin enabled.

Steps to reproduce

1. Add multi tool gcode file
2. Click on 'Print'
3. Scroll down to 'Select spools for print'
4. Start Print button remains grey. Cant start print unless I disable filament manger.

Expected behavior
When spools are selected button becomes active to start print.

Did the same happen when all other 3rd party plugins are disabled?
No, FilamentManager

Log file
Drag and drop the octoprint.log here.

Screenshots
Screenshot added