The table "fe_users" does not exist.

#0 C:\inetpub\vhosts\hasenschule\htdocs\typo3conf\ext\oelib\class.tx_oelib_db.php(594): tx_oelib_db::retrieveColumnsForTable('fe_users')
#1 C:\inetpub\vhosts\hasenschule\htdocs\typo3conf\ext\oelib\class.tx_oelib_configcheck.php(1006): tx_oelib_db::getColumnsInTable('fe_users')
#2 C:\inetpub\vhosts\hasenschule\htdocs\typo3conf\ext\oelib\class.tx_oelib_configcheck.php(954): tx_oelib_configcheck->getDbColumnNames('fe_users')
#3 C:\inetpub\vhosts\hasenschule\htdocs\typo3conf\ext\seminars\class.tx_seminars_configcheck.php(844): tx_oelib_configcheck->checkIfMultiInTableOrEmpty('showFeUserField...', false, '', 'These values sp...', 'fe_users')
#4 C:\inetpub\vhosts\hasenschule\htdocs\typo3conf\ext\seminars\class.tx_seminars_configcheck.php(391): tx_seminars_configcheck->checkShowFeUserFieldsInNotificationMail()
#5 C:\inetpub\vhosts\hasenschule\htdocs\typo3conf\ext\seminars\class.tx_seminars_configcheck.php(84): tx_seminars_configcheck->checkNotificationMail()
#6 C:\inetpub\vhosts\hasenschule\htdocs\typo3conf\ext\seminars\class.tx_seminars_configcheck.php(49): tx_seminars_configcheck->check_tx_seminars_registration()
#7 C:\inetpub\vhosts\hasenschule\htdocs\typo3conf\ext\oelib\class.tx_oelib_configcheck.php(168): tx_seminars_configcheck->check_tx_seminars_registrationmanager()
#8 C:\inetpub\vhosts\hasenschule\htdocs\typo3conf\ext\oelib\class.tx_oelib_configcheck.php(129): tx_oelib_configcheck->checkByClassNameAndFlavor()
#9 C:\inetpub\vhosts\hasenschule\htdocs\typo3conf\ext\oelib\class.tx_oelib_templatehelper.php(1337): tx_oelib_configcheck->checkIt()
#10 C:\inetpub\vhosts\hasenschule\htdocs\typo3conf\ext\seminars\pi1\class.tx_seminars_pi1.php(247): tx_oelib_templatehelper->checkConfiguration(true)
#11 [internal function]: tx_seminars_pi1->main('', Array)
#12 C:\inetpub\vhosts\hasenschule\htdocs\typo3\sysext\cms\tslib\class.tslib_content.php(6585): call_user_func_array(Array, Array)
#13 C:\inetpub\vhosts\hasenschule\htdocs\typo3\sysext\cms\tslib\content\class.tslib_content_user.php(55): tslib_cObj->callUserFunction('tx_seminars_pi1...', Array, '')
#14 C:\inetpub\vhosts\hasenschule\htdocs\typo3\sysext\cms\tslib\class.tslib_content.php(780): tslib_content_User->render(Array)
#15 C:\inetpub\vhosts\hasenschule\htdocs\typo3\sysext\cms\tslib\class.tslib_fe.php(3307): tslib_cObj->USER(Array)
#16 C:\inetpub\vhosts\hasenschule\htdocs\typo3\sysext\cms\tslib\class.tslib_fe.php(3243): tslib_fe->INTincScript_process(Array)
#17 C:\inetpub\vhosts\hasenschule\htdocs\typo3\sysext\cms\tslib\index_ts.php(367): tslib_fe->INTincScript()
#18 C:\inetpub\vhosts\hasenschule\htdocs\index.php(76): require('C:\\inetpub\\vhos...')
#19 {main}