FYI Appears to potentially be an issue with Ropsten testnet after Istanbul hardfork (block 6485846)
You may want to use a different testnet until this is resolved.
Etherscan is showing the last block as 6485846
https://ropsten.etherscan.io
Blockscout is showing current blocks
https://blockscout.com/eth/ropsten
Parity Network Stats:
https://ropsten-stats.parity.io/