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Hello,

I'm having a problem where no users can be created.

I've attached images to try and assist in fixing this problem.

STEP 1 - Creating a new user
[attachment=21494]

STEP 2 - Once I have created a new user, this message appears and NO new user is added to the forum.
[attachment=21495]

STEP 3 - Showing userfields. The black box is where the new user was created.
[attachment=21496]

STEP 4 - Showing users. The black box is where the new user was created.
[attachment=21497]

I really need to solve this problem as no new users can signup to my forum. The same issue occurs if the user registers.

Thanks
Go to ACP > Tools & maintenance > File Verification > does it say any are changed?? Also, what plugins do you have??
File Verification: Found Problems
File Status
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images/english/postbit_replyall.gif Changed
images/english/pm_delete.gif Changed
images/english/postbit_quote.gif Changed
images/english/postbit_reputation.gif Changed
images/english/postbit_delete.gif Changed
images/english/postbit_report.gif Changed
images/english/postbit_spam.gif Changed
images/english/rateuser.gif Changed
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images/english/postbit_www.gif Changed
images/english/newthread.gif Changed
images/english/postbit_warn.gif Changed
images/english/postbit_multiquote_on.gif Changed
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images/english/postbit_quickquote.gif Changed
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images/default_avatar.gif Changed
inc/languages/english/akismet.lang.php Changed
inc/languages/english/archive.lang.php Changed
inc/languages/english.php Changed
install/images/bullet.gif Missing
install/images/content_bg.gif Missing
install/images/error_bg.gif Missing
install/images/h2-admin.gif Missing
install/images/h2-config.gif Missing
install/images/h2-createtables.gif Missing
install/images/h2-dbconfig.gif Missing
install/images/h2-finish.gif Missing
install/images/h2-license.gif Missing
install/images/h2-requirements.gif Missing
install/images/h2-tablepopulate.gif Missing
install/images/h2-theme.gif Missing
install/images/h2-welcome.gif Missing
install/images/index.html Missing
install/images/submit_bg.gif Missing
install/images/tcat_bg.gif Missing
install/images/thead_bg.gif Missing
install/index.php Missing
install/resources/adminoptions.xml Missing
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install/resources/index.html Missing
install/resources/language.lang.php Missing
install/resources/mybb_theme.xml Missing
install/resources/mysql_db_inserts.php Missing
install/resources/mysql_db_tables.php Missing
install/resources/output.php Missing
install/resources/pgsql_db_tables.php Missing
install/resources/settings.xml Missing
install/resources/sqlite_db_tables.php Missing
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install/resources/upgrade9.php Missing
install/resources/usergroups.xml Missing
install/stylesheet.css Missing
install/upgrade.php Missing

Akismet (1.2.1)
Awards (2.0)
Fit on Page (2.3)
Force Users To Read Threads (2.0)
Form Manager (1.0)
Forum Cleaner (2.4.4)
MyBB GoMobile (1.0 Beta 3)
Hello World! (1.0)
Invitation Only (1.0)
LockOldThreads (1.0)
Welcome PM/Email (1.1)
Hmm... I've looked at the code that runs when adding a user, and it doesn't run anything that would cause this message to show, it only shows this message when you try to edit/delete/activate a user that doesn't exist. In fact, if the UID is NULL when the user is inserted, that's MySQL acting up, as that number is generated automatically by MySQL, not MyBB.

Would you be able to PM me FTP login details?? There's two or three things I'd like to check.