Fix url to imoprt task.

src/store/modules/feature_type.js

@@ -190,7 +190,7 @@ const feature_type = {
     },
 
     GET_IMPORTS({ commit }, { project_slug, feature_type }) {
-      let url = `${this.state.configuration.VUE_APP_DJANGO_API_BASE}import-tasks`;
+      let url = `${this.state.configuration.VUE_APP_DJANGO_API_BASE}import-tasks/`;
       if (project_slug) {
         url = url.concat('', `${url.includes('?') ? '&' : '?'}project_slug=${project_slug}`);
       }