Merge pull request #12461 from GordonSmith/HPCC-21897-DISK_USAGE_OPEN

HPCC-21897 ECL Watch error opening Group

Reviewed-By: Miguel Vazquez <miguel.vazquez@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>

esp/src/eclwatch/ActivityWidget.js

@@ -531,7 +531,7 @@ define([
             },
 
             createDetail: function (id, row, params) {
-                if (params.usage) {
+                if (params && params.usage) {
                     return new DelayLoadWidget({
                         id: id,
                         title: row.details.Name,