When trying to launch an algo for live trading with IB, and inputing an adviser account, the system seems to require to subscripe to the $250 a month plan?

When using the personal account (under the advisor plan), this is not the case, but then the same algorithm which works fine in backtesting and live paper trading, has the following error:

"LiveTradingRealTimeHandler.Run(): There was an error in a scheduled event EveryDay: SPY: 210 min before MarketClose-3f570f24d1214707bdf43380cc0ce804. The error was IOError : (10, 'No child processes')(Open Stacktrace)"

Have searched the documentation and posts for any relevant info but have not found any. Any ideas? Thanks!