Error in Migrationsmanager after update to 10.4.4

[BlackMoon]

Plesk 10.4.4
OS: Win2k8R2 Web

I see that error when i click on Panel "Migrationsmanager" ...

anyone a solution? ^^

Unknown data type .
---------------------- Debug Info -------------------------------
0: PMMResponse.php:149
PMMResponse->getData()
1: MigrationCurrentTasksList.php:105
MigrationCurrentTasksList->fetchMigrationCurrentTasksList()
2: cList.php:93
cList->fetchList()
3: cList.php:112
cList->init()
4: server.migration.php:77
plesk__server__migration->accessTasksList(string 'GET', NULL null)
5: server.migration.php:65
plesk__server__migration->accessItem(string 'GET', NULL null)
6: UIPointer.php:600
UIPointer->access(string 'GET')
7: plesk.php:50