Procedure code unavailable for the graph algorithm book?

I am reading the “Graph Algorithms” practical Examples. When I run the following code: CALL algo.closeness.stream(“User”, “FOLLOWS”) YIELD nodeId, centrality RETURN algo.getNodeById(nodeId).id, centrality ORDER BY centrality DESC It reports an error: There is no procedure with the name `algo.closeness.stream` registered for this database instance. Please ensure you’ve spelled the procedure name correctly and that the…

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Cannot open system settings in Ubuntu 19.10

Recently I was unable to open Settings in Ubuntu 19.10 I tried to reinstall gnome-control-center, but didn’t work. I cannot open system settings in ubuntu 17.10 It doesnt open the Users Settings, System Settings Cannot open gnome-control-center in ubuntu 17.04 This is the output in terminal When running in superuser # gnome-control-center Bail out! ERROR:../shell/cc-shell-model.c:458:cc_shell_model_set_panel_visibility:…

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