[Create from backup] UnboundLocalError: local variable 'source' referenced before assignment

Actions before raising this issue

• I searched the existing issues and did not find anything similar.
• I read/searched the docs

Steps to Reproduce

Uploading the following backup zip file on the CVAT task page "Create from backup" button. This will results in an error

UnboundLocalError: local variable 'source' referenced before assignment

backup_file

Repo for creating the zip

Expected Behavior

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Possible Solution

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Context

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Environment