Anonymous try using the "Time" instead of duration. If you still get an error/ not the result that is required.
then, use the use "Split Colum"-> "By Delimiter"-> "left-most delimeter" ->use space as the delimiter. you will get two columns, one with date and one with time along with AM/PM. in the time column, change the type and see if it is resolved.
Don't forget to not paste the first two lines as stated.
Also, you will need to change the Table reference in my #"Convert to Number" step to the appropriate one in your code (probably to #"Changed Step"; and you should probably eliminate the type definition for the Funnel Duration column in your #"Changed Step" code