While trying to access Plesk control panel you may get below license errors and you will not be able to navigate to any of the options in Plesk panel.
Error Details:
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It is not possible to access Parallels Plesk Panel. Browser displays one of the following errors:
ERROR: SWKeyExFatalError
xmlrpc error: XML parsing failed
0: common_func.php3:4523
of_get_key_by_product(string 'plesk-win')
1: common_func.php3:4523
getPleskKey()
2: common_func.php3:4602
getKeyProp(string 'demo')
3: auth.php3:54
OR
xmlrpc error: Expected <param> to have 1 children, found 0
---------------------- Debug Info -------------------------------
0: Abstract.php:102
of_get_key_by_product(string 'plesk-win')
1: Abstract.php:102
Smb_Application_Abstract::getKey()
2: General.php:30
Smb_License_General::getInstance()
3: Restrictions.php:43
CommonPanel_Aps_Restrictions->isStorefrontEnabled()
4: CatalogsConfiguration.php:54
Smb_Plesk_Bridge_Aps_CatalogsConfiguration->_getDefaultCatalogConfig()
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This issue occurrs when the file 'registry.xml' got corrupted. Thus the size of this file will be 0KB.
To resolve this issue, we need to recreate the file 'registry.xml'.
To recreate it, follow below steps.
Login to Server >> navigate to '%plesk_dir%\admin\repository\' >> Remove the empty file 'registry.xml' >> access Plesk panel once again.
It should be fixed...