Last block is more than half an hour ago already
or is it normal?
The network difficulty is adjusted (every 2 weeks) to have a block every 10 minutes on average.
While 10 minutes is the targeted timeframe it can still take a few seconds up to a few hours until a block is mined.
This all is determined by
when a miner finds 'the right hash'. Its comparable to the needle in a haystack.
Its completely normal to not have a block mined for 30 minutes.