fix: added error message for account not found on chain

[jijicodes]

Description and Motivation

Added error message that is more descriptive for account not found on chain.

Related Issues

Resolves #517

Checklist:

• [x] I have read Migaloo's contribution guidelines.
• [x] My pull request has a sound title and description (not something vague like Update index.md)
• [x] All existing and new tests are passing.
• [x] I updated/added relevant documentation.
• [x] The code is formatted properly yarn lint.
• [x] The project builds and is able to deploy on Netlify yarn build.

[netlify[bot]]

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