I also had trouble with this shit - Electron Cash. As user HCP had adviced I disabled 2FA in new Electrum wallet (2.9.3) and opened it in Electron (2.9.3). After many "server doesn't response" errors it sent test transactions to "bitcoin.com" and Bittrex wallets.
I've noticed that first try to send BCC just after opening Electron is more likely to be successfull. So I tried opening and sending it many times. Some of them were broadcasted, most didn't. But those who did appeared in "bitcoin.com" and Bitterx wallets.
Hope my experience will help you.
Your problem is that BCH recently had a HardFork... and you need to be using v2.9.4 of ElectronCash... I think a lot of the servers won't play nice with ElectronCash v2.9.3... so make sure you update to v2.9.4 for
ElectronCash Newest versions of Electrum seem to have a few little "bugs"... so if you're messing around trying to disable 2FA etc on Electrum, I would suggest v2.9.3
I strongly wanted to use 2.9.4 version but it just didn't open wallet backuped by 2.9.3. Wallet closed without any error messages. Whatever, I send BCC from 2.9.3 and sold it on Trex.
Thank you for your advices, they really helped me.