Describe the bug
When I run popsift for one image crash,The default parameters are used
my email: [email protected]

To Reproduce
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2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
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Screenshots
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Log
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Desktop (please complete the following and other pertinent information):

• OS: [e.g. win 10, osx, ]
• PopSift version: please specify if you are using a release version or your own build
  • Binary version (if applicable) [e.g. 2019.1]
  • Commit reference (if applicable) [e.g. 08ddbe2]

Additional context
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