1. Transaction hasn't been included to a blockchain.
Cryptocurrencies aren't stable, so minor errors might occur.
2. ETC and ETH confusion.
The addresses of Ethereum (ETH) and Ethereum Classic (ETH) are of the same structure.
If you send ETC or ETH, make sure that you've created an appropriate transaction on StormGain.
For example, if you create an ETH to BTC transaction, make sure that you send ETH, not ETC.
Otherwise, your transaction will be stuck.
3. Wrong XLM Memo id message.
While sending XLM, make sure that you've put a correct Memo id.
It's looks like a combination of digits.
Messages like "Hey! How are you?", "I love StormGain" etc. are lovely but don't work, unfortunately :)
4. Other internal errors.
Even our perfect system may experience internal issues.
If you suppose that this is the case, please report it to us using the Feedback form.