I was having the same problem as others here running CB 2.0.7, PHP 5.5.21. CBSubs GPL 4.0.0-rc.2 also. I just upgraded on a test site from CB 1.9.1.
I got the error whether I ran the cron command line or clicked on the link in Paid Subscriptions->Mailer.
Based on the format for the URL described in one of Kyle's posts I found that the URL in the Mailer: Automation Settings was incorrect. It contained the following (BTW, this was in all 3 URLs on the page, which were identical).
Not sure what keeps causing the URLs to break like that, but it seams fine in CB 2.0.9 and CBSubs 4.x nightly build. So if anyone else runs into this issue please upgrade or check the URLs against the below.
Kyle (Krileon) Community Builder Team Member Before posting on forums:
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