Coqtail: Errors in autocompletion

When I try to autocomplete with ctrl+n I get the errors below. Reproducing this seems to require at least one Require loaded.

Require List. (* stop Coq buffer here *)
f (* ctrl+n here *)

Scanning tags.
Error detected while processing function coqtail#FindLib:
line    1:
Traceback (most recent call last):
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Error detected while processing function coqtail#FindLib:
line    1:
  File "<string>", line 1, in <module>
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Error detected while processing function coqtail#FindLib:
line    1:
NameError: name 'Coqtail' is not defined
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Error detected while processing function coqtail#FindLib:
line    1:
E858: Eval did not return a valid python object