importing external repository instance failed
I have set up an external instance of wikipedia under "administration" --> "Repository" --> "Manage external content connectors"
I go to "External Repositories" --> "WikiPedia", I can see all the external contents of Wikipedia pages, I selected one of the Wikipedia content, and pushed the "Import" button, the system hanged with the following error message
Fatal error: Class 'webpage' not found in /var/www/core/common/libraries/php/shared/storage/data_class/data_class.class.php on line 96
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