CiviCRM Community Forums (archive)

I have a contribution page for anonymous users on my site so that new individuals can join (pay for a membership) our organization. Thanks to Hershel we recently updated to Drupal 7 and CiviCRM 4.3.5. The page is in the form of https://www.xxxxx.org/civicrm/contribute/transact?reset=1&id=1. The pages has been working fine for those who already have a Drupal account on the site. However, it fails when an anonymous user clicks the contribute button at the bottom of the page with the following error.

Sorry but we are not able to provide this at the moment.
We can't load the requested web page. This page requires cookies to be enabled in your browser settings. Please check this setting and enable cookies (if they are not enabled). Then try again. If this error persists, contact the site adminstrator for assistance.

Site Administrators: This error may indicate that users are accessing this page using a domain or URL other than the configured Base URL. EXAMPLE: Base URL is http://example.org, but some users are accessing the page via http://www.example.org or a domain alias like http://myotherexample.org.

Error type: Could not find a valid session key.

In my troubleshooting attempt, I found a similar forum post on the subject (http://forum.civicrm.org/index.php?topic=29359.0). Following that post, I have done the following to no avail:

Cleared the Drupal cache at Administration > Configuration > Development > Performance.
Performed template directory clean up using the following URL: https://www.xxxxx.org/civicrm?reset=1&directoryCleanup=3.
Manually executed the Clean-up Temporary Data and Files scheduled job. The job log states the process was successful.
Finally, I truncated the drp_sessions table.

None of this has been successful. Our site does use SSL. I do have ReCAPTCHA configured on the contribution page. Any thoughts as to the source of my problem? Thanks.

I had to look around in order to remember how to disable the ReCAPTCHA. Sadly, that wasn't the problem. Even without ReCAPTCHA I still get the error. Thanks.

Aha!

I finally figured it out. My Drupal 7 installation was missing its anonymous (ID 0) user. I had to follow the instructions at https://drupal.org/node/1029506 in order to restore the anonymous user. Now, the contribution page is working as it should. I hope this helps someone else who runs into this problem.