Question:
Plesk is GUI not accessible after update from Onyx to Obsidian: ERROR: Type of GraphQL\Language\AST\ScalarTypeDefinitionNode::$kind must not be defined
Symptoms
After the Plesk upgrade the Plesk panel is not accessible with the error:
QuoteERROR: Type of GraphQL\Language\AST\ScalarTypeDefinitionNode::$kind must not be defined (as in class GraphQL\Language\AST\Node) (ScalarTypeDefinitionNode.php:5)
After the Plesk upgrade the "Extensions" page is not accessible with the error:
QuoteERROR: Type of Plesk\GraphQl\Types\SafeIntType::$name must not be defined (as in class GraphQL\Type\Definition\Type) (SafeIntType.php:0)
Plesk was updated from 17.8.11 to 18.0.55
Cause
The upgrade bug with ID EXTPLESK-4981.
Resolution
Until the bug is fixed, follow the next steps to resolve that:
Connect to the server via RDP
Execute the following command in cmd.exe:
c:\>plesk bin extension --install catalog