How to fix MetaMask error 'Unable to find conversion rate'

The 'Unable to find conversion rate' or 'unable to load balance' error message can be prompted because:

• You are using the wrong token address. Check here for guidance on how to find it.
• MetaMask needs to be updated to the latest version.

If the token you are looking for is not found using the Search method, then you will need to add it as a Custom Token.