Following on from:
You logged in and signed up...you do not have a member number either.
It is zero.
Are the e-newsletter members SUPPOSED to have a member number?
I notice that there is a bunch of members assigned the "0" number - shouldn't they be assigned numbers?
Those look to be the members that were blocked from your subscription page before you fixed the "permission" error message.
As noted in the previous post, the permission error happens when Double optin is NOT checked. You only fix it by checking the double opt in as per the link to the post that explained it.