Sheet G How to obtain an average duration?

I have a duration series which is also the result of a formula in a column formatted in duration

Duration :
80:08:00
53:05:00
50:20:00
86:21:00
59:56:00
44:27:00
#VALUE!
35:44:00
39:29:00
133:45:00
35:07:00
32:20:00
.../...

I would like to get the MIN, MAX and AVERAGE values. For the average I tried this formula

=ARRAYFORMULA(AVERAGE(TIMEVALUE(E2:E305)))

I have this error:

#VALUE! ERROR TIMEVALUE parameter '' cannot be parsed to date/time

How to exclude the cell with no value inside?