i tried a 2nd time on testnet and i tried to establish an payment with an opened channel but i doesnt't work

Steps:

Create 2 Electrum LN Wallets
Withdraw test coins to wallet1

Wallet1: create an payment channel with enough funds to spent.
Wallet2: create an invoice.

Wallet1: Send the invoice for Wallet2 oven lightning.

Result:  Error Message: Path not found.

Then i found an other way for testing

Use the site: https://starblocks.acinq.co/  this is an virtual starbucks coffe shop  ( thnx to @nc50lc )

And this transaction works everytime i've tried so far

so, whats wrong with my own testing structure with the 2 electrum wallets ? 

best regards