Humanize copy failure

[mjh1]

The existing logic was meant to be catching these but the format of the errors probably changed at some point

[codecov]

Codecov Report

Merging #198 (7fda0d1) into main (321380d) will not change coverage.
The diff coverage is 100.00000%.

@@              Coverage Diff              @@
##                main        #198   +/-   ##
=============================================
  Coverage   13.57174%   13.57174%           
=============================================
  Files             18          18           
  Lines           2321        2321           
=============================================
  Hits             315         315           
  Misses          1982        1982           
  Partials          24          24           

Impacted Files	Coverage Δ
task/runner.go	22.52632% <100.00000%> (ø)

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Impacted Files	Coverage Δ
task/runner.go	22.52632% <100.00000%> (ø)