Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
Attempting to archive emails from my inbox in Thunderbird.
   * What exactly did you do (or not do) that was effective (or
     ineffective)?
See above
   * What was the outcome of this action?
There was no visible action. The message remained in the inbox. When checking the developer console, the following error message was present:
Uncaught Error: Can only have one Message Arhiver running at once.
   * What outcome did you expect instead?
Message to be sent to correct archive folder on server.

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