Look here and you will be able to see where you sent it:
https://blockchain.info/
Paste your paper wallet public address in the top search.

What i suspect is you moved your bitcoin to one of the wallet addresses electron generated, so you'd need to use the same seed with electrum to see the btc.  Old versions of electron were using the bitcoin network not the bitcoin cash network, only seems to work after 3.x.

I recently moved my coins and electron was buggy as all hell before 3.x