Same here, all backups failed:
Looking at Repository gives:
<b>Source:</b> Microsoft OLE DB Provider for SQL Server<br/><b>Description:</b> Invalid column name 'parameters_id'.
---------------------- Debug Info -------------------------------
0: C:\Program Files\SWsoft\Plesk\admin\plib\common_func.php3:206
com->execute(string 'select [id], [host], [port], [type], [admin_login], [admin_password], [last_error], [server_version], [parameters_id] from [DatabaseServers] where [id]=1', NULL null)
1: C:\Program Files\SWsoft\Plesk\admin\plib\common_func.php3:206
db_query(string 'select [id], [host], [port], [type], [admin_login], [admin_password], [last_error], [server_version], [parameters_id] from [DatabaseServers] where [id]=1')
2: C:\Program Files\SWsoft\Plesk\admin\plib\class.Table.php:189
Table->select()
3: C:\Program Files\SWsoft\Plesk\admin\plib\class.cObject.php:458
cObject->fetchAttrsFromTable_()
4: C:\Program Files\SWsoft\Plesk\admin\plib\DatabaseServer.php:40
DatabaseServer->__construct(string '1')
5: C:\Program Files\SWsoft\Plesk\admin\plib\common_func.php3:2971
objectMaker(string 'DatabaseServer', string '1')
6: C:\Program Files\SWsoft\Plesk\admin\plib\bu\db\class.DbServerBackupManager.php:22
DbServerBackupManager->__construct(string '1')
7: C:\Program Files\SWsoft\Plesk\admin\plib\common_func.php3:2971
objectMaker(string 'DbServerBackupManager', string '1')
8: C:\Program Files\SWsoft\Plesk\admin\plib\bu\db\class.DbBackupManager.php:601
DbBackupManager->GetOperatable(boolean true, string '', boolean true, boolean false)
9: C:\Program Files\SWsoft\Plesk\admin\plib\bu\db\class.DbDomainBackupManager.php:138
DbDomainBackupManager->HasDatabases(boolean true, boolean false, string '')
10: C:\Program Files\SWsoft\Plesk\admin\plib\bu\db\class.DumpsListForm.php:91
DumpsListForm->CanBackup(integer '2', NULL null, string '')
11: C:\Program Files\SWsoft\Plesk\admin\plib\bu\db\class.DumpsListForm.php:48
DumpsListForm->assign(object of type DumpsList, integer '2', NULL null)
12: C:\Program Files\SWsoft\Plesk\admin\plib\ui\client.domain.dbbackup.php:160
plesk__client__domain__dbbackup->accessItem(string 'GET', NULL null)
13: C:\Program Files\SWsoft\Plesk\admin\plib\UIPointer.php:529
UIPointer->access(string 'GET')
14: C:\Program Files\SWsoft\Plesk\admin\htdocs\plesk.php:13
=====================================
Doing a manual backupgives error:
Invalid column name 'parameters_id'.
Since this is a machine with a limited amount of acccounts, I have no problem with it when someone wants to check or look at the DB.