TypeError: unsupported operand type(s) for |: 'type' and 'NoneType' with blog plugin #5881
Description
Context
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Bug description
When blog plugin is enabled, the build fails with TypeError: unsupported operand type(s) for |: 'type' and 'NoneType' with blog plugin. This happens on version 9.2.0 and 9.2.1, but did not happen with 9.2.0b3 in the same Python environment.
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Reproduction
Steps to reproduce
mkdocs build
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