This error usually occurs when a trading pair is no longer available on your chose exchange.
This could be due to a number of factors including, but not limited to:
- The trading pair has been disabled either temporarily or permanently on the exchange
- The trading pair has been removed from the platform
When coding your bot via the Code Editor, it could mean that you made a typo when coding.
The steps that you can take to rectify this problem are:
- Check the symbol name is correct
- Check the symbol is available on the given exchange
- Ask for help
Please find the links to supported trading pairs on exchanges here.