Unable to open Azure DNS extension: 500 error: Cannot access offset of type string on string

Symptoms

• After the authorization was completed, opening Extensions > My Extensions > Azure DNS > Open returns:

PLESK_ERROR: 500 error: Cannot access offset of type string on string.

• The authorization was made according to the official documentation.
• The extension was working before the authorization process.
• The following error can be seen in the panel.log:

CONFIG_TEXT: [2023-05-03 19:30:45.283] 4074085:64529a3fbdfc9 ERR [panel] Cannot access offset of type string on string:
0: /opt/psa/admin/plib/modules/azuredns/library/Client/AzureDnsClient.php:179
PleskExt\AzureDns\Client\AzureDnsClient->listByResourceGroup()
1: /opt/psa/admin/plib/modules/azuredns/library/DomainItem/DomainItemInfoLoader.php:58
PleskExt\AzureDns\DomainItem\DomainItemInfoLoader->getDomainItemInfoList()
2: /opt/psa/admin/plib/modules/azuredns/controllers/ServiceController.php:46
ServiceController->getDomainList()
3: /opt/psa/admin/plib/modules/azuredns/controllers/ServiceController.php:21
ServiceController->indexAction()
4: /opt/psa/admin/plib/vendor/plesk/zf1/library/Zend/Controller/Action.php:516
Zend_Controller_Action->dispatch(string 'indexAction')
5: /opt/psa/admin/plib/vendor/plesk/zf1/library/Zend/Controller/Dispatcher/Standard.php:308
Zend_Controller_Dispatcher_Standard->dispatch(object of type Zend_Controller_Request_Http, object of type Zend_Controller_Response_Http)
6: /opt/psa/admin/plib/vendor/plesk/zf1/library/Zend/Controller/Front.php:954
Zend_Controller_Front->dispatch()
7: /opt/psa/admin/plib/pm/Application.php:87
pm_Application->run()
8: /opt/psa/admin/htdocs/modules/azuredns/index.php:5

Cause

The zone isn't correctly defined on the Azure DNS portal.

Resolution

Follow the official steps to create the zone on Azure or contact Azure DNS support for assistance.