[VE][108] Error Message Feedback

I've checked my page www.aeroclubvicenza.it/index.html but the system give me errors in meta tag i cannot understande, i report numbers:

1,2,3,4,5,6,7,8,9,10,12,13 (why can't i specify height?), 14, 16 ,17

Thanks

Stefano Marchesin