I've made a bit of progress on this. I am still getting the debug error when starting the cslabs plugin. I have removed and reinstalled the plugin buts that error is still there.
As for the "Wrong digital input filter period" I found out what causes it. In the MISC I/O tab there is a box for Input signals filter. If there is not a number in this box you get the error. Ive put in 2 and saved the settings but when I reopen the plugin sometimes it seems to have forgotten the number and gives out the error message again.
The Spindle drive fault. Machine stopped is still there as well. I have reconnected the fault input from the vfd and setup the Spindle alarm input on the plugin but I still get the error message after pressing reset. Regardless of which way I set the input for high or low active the error message is still there so I have turned off the Spindle alarm input enable for the moment.