fix: fix the wrong error return value

[drawdrop]

Pull Request Template

⚠️ Please do not submit a Pull Request without creating an issue first. Any change needs to be discussed.

Description

In fact, err is incorrect and should be assistantErr .

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Test A
• Test B

Checklist:

• I have read the Contributing documentation.
• I have read the Code of conduct documentation.
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have checked my code and corrected any misspellings

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[henomis]

Thank you! 🚀