Upgraded to 5.5.1, now can't login

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I can't figure this one out - having upgraded to 5.5.1, now when I try to login, the login process is looking for a "Default Language" for the admin user, and not finding it, so not letting me in. My site is completely in English, with no languages installed, so to me it just doesn't make sense.

To log in, I have to downgrade by deleting 'DIRNAME_APP_UPDATED' in site.php, and then restoring it once I've logged in.

What could be the problem? The error message is this:
mysql error: [1054: Unknown column 'uDefaultLanguage' in 'field list'] in EXECUTE("select uID, uName, uIsActive, uIsValidated, uTimezone, uDefaultLanguage from Users where uName = 'admin' and uPassword = '5aeb143a5afdf86b20ec6fddc876a4b0'")


Cheers,
Richard

stretchrt
 
Korvin replied on at Permalink Reply
Korvin
Try navigating tohttp://YOURSITE/index.php/tools/required/upgrade/...

Run that upgrade and see if that doesn't resolve your problem
stretchrt replied on at Permalink Reply
stretchrt
There's no upgrade there to run - tells me I'm already up to date. I even re-ran the script, but no difference.