Electrum: What does bad-txns-vin-empty mean?

Code:

I wanted to test out a segwit wallet on electrum, but when I broadcast a new transaction I get the this error.
[code]
error: {'code': 1, 'message': 'the transaction was rejected by network rules.\n\n16: bad-txns-vin-empty

Steps to reproduce
1. Create new segwit wallet with electrum
2. Send funds to an andress from this wallet
3. Send funds from this address

What does this error mean and how can I fix it?[/code]