fix(kube): check for ns on enter [EE-5160] (#8647)

Co-authored-by: testa113 <testa113>

app/kubernetes/__module.js

@@ -46,6 +46,8 @@ angular.module('portainer.kubernetes', ['portainer.app', registriesModule, custo
             if (endpoint.Type === PortainerEndpointTypes.EdgeAgentOnKubernetesEnvironment && endpoint.Status === EnvironmentStatus.Down) {
               throw new Error('Unable to contact Edge agent, please ensure that the agent is properly running on the remote environment.');
             }
+
+            await KubernetesNamespaceService.get();
           } catch (e) {
             let params = {};