problem when changing speed slider

[eddie120678]

I got the following error when trying to slow down the print speed during a print. How do I go about correcting this error so that the function work as intended.

root.speed_slider.SetValue(value) TypeError: Slider.SetValue(): argument 1 has unexpected type 'float' Error in sys.excepthook: Traceback (most recent call last): File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 153, in apport_excepthook with os.fdopen(os.open(pr_filename, FileNotFoundError: [Errno 2] No such file or directory: '/var/crash/_usr_bin_pronterface.1000.crash'