7
Someone else had this same problem and we found out it was because they couldn't use the xoopsupdate.php script when the site is closed.
So I suggest...
1. Try to run the xoopsupdate.php page again.
2. If that works, you should be able to login, if not...
3. You need to temporarily open your site, try xoopsupdate.php again, then close it.
Some database queries to do that are:
(replace 'xoops' with your own database prefix)
to open your site:
UPDATE xoops_config SET conf_value=0 WHERE conf_name = 'closesite'
Try xoopsupdate.php again
If it succeeds and you can login again, then you can just use the admin to close your site again.
otherwise...
to close your site again:
UPDATE xoops_config SET conf_value=1 WHERE conf_name = 'closesite'