solo.contracts.liquidatorProxyV1.options.address Returns null on test environment

[oussaki]

Am trying to run the script in Ropsten network i have did some changes in .env.test file this way

`# Gas Management
GAS_STATION_URL=http://ethgasstation.info/json/ethgasAPI.json
GAS_PRICE_MULTIPLIER=2
GAS_PRICE_UPDATE_FREQUENCY_SEC=120
GAS_INITIAL_PRICE=30000000000
GAS_REQUEST_TIMEOUT_MS=10000
GAS_PRICE_ADDITION=1

Solo Liquidations

SOLO_LIQUIDATIONS_ENABLED=true
SOLO_EXPIRATIONS_ENABLED=true
SOLO_COLLATERAL_PREFERENCES=0,3,2
SOLO_OWED_PREFERENCES=0,3,2
SOLO_EXPIRED_ACCOUNT_DELAY_SECONDS=3600
SOLO_MIN_ACCOUNT_COLLATERALIZATION=0.5
SOLO_MIN_OVERHEAD_VALUE=100e36
SOLO_ACCOUNT_NUMBER=0
SOLO_LIQUIDATE_POLL_INTERVAL_MS=5000

ETHEREUM_NODE_URL=https://ropsten.infura.io/v3/xxb3e2b7xx30xxx891x125xxx3bf3xx
DYDX_URL=https://api.stage.dydx.exchange
WS_URL=wss://api.stage.dydx.exchange/v1/ws
NETWORK_ID=3
WALLET_ADDRESS=0x15DCc844101CF6507fB729Bf98b82f4726E7bC18
WALLET_PRIVATE_KEY=0xf984xxx297e8f22d4xxxxf8cccccccxaa37xxx749002e45fxxdcxxxd57
ACCOUNT_POLL_INTERVAL_MS=5000
MARKET_POLL_INTERVAL_MS=5000
LIQUIDATION_KEY_EXPIRATION_SEC=300`

But when i checked the logs solo.contracts.liquidatorProxyV1.options.address is always returning null in this case.

and the script crash right away.