Fixes imports in __init__.py and moves exception handling around

[desertaxle]

The imports in __init__.py were incorrect and led to blocks not being correctly registered. I updated the imports and moved exception handling around so that import errors on our own modules aren't swallowed.

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Checklist

• References any related issue by including "Closes #" or "Closes ".
  • If no issue exists and your change is not a small fix, please create an issue first.
• Includes tests or only affects documentation.
• Passes pre-commit checks.
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• Summarizes PR's changes in CHANGELOG.md