fix: load-fallback catch

[pd4d10]

Description

Added await to catch async errors correctly.

Additional context

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What is the purpose of this pull request?

• Bug fix

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• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the Commit Convention.
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• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).

[patak-dev]

This was already done in #4703 by @iheyunfei, but we want to merge it during the 2.7 beta. Let's have this PR merged now so we can include it in today's 2.6 patch release