[2017-07-24T07:53:47Z] ERROR: Nikola: ValueError: Missing date in file posts/vim22.md
Or something like:
ValueError: Unrecognized date/time: ''
raise ValueError("String does not contain a date.")
At least for me, it was because the metadata at the top of the post wasn't being recognized. Switching it up to match Nikola's regular reST-style (optionally contained in HTML comments) worked for me. From this post:
<!-- .. title: markdown error in nikola .. slug: markdown-error-in-nikola .. date: 2017-07-24 00:45:37 UTC-07:00 .. type: text -->