not working: getting "Invalid response from server"

e14
getting "Invalid response from server"


multiple efforts over the last week, always the same response. reinstalled multiple times.

zotero v2, firefox 3.5.8, all additional firefox addons disabled
report code:

1506351364


https://sync.zotero.org/login

<response timestamp="1267020817.7634" version="8">
<error code="NO_API_VERSION">API version not specified</error>
</response>

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