diff --git a/ui/src/app/applications/components/application-create-panel/application-create-panel.tsx b/ui/src/app/applications/components/application-create-panel/application-create-panel.tsx
index 9cdd610d3e618..3397c2c3c671c 100644
--- a/ui/src/app/applications/components/application-create-panel/application-create-panel.tsx
+++ b/ui/src/app/applications/components/application-create-panel/application-create-panel.tsx
@@ -143,7 +143,7 @@ export const ApplicationCreatePanel = (props: {
                 }>
                 {({projects, clusters, reposInfo}) => {
                     if (pathHasOpsmx) {
-                        window.parent.postMessage(window.btoa(JSON.stringify({msg:'loadEvent'})),'*')
+                        window.parent.postMessage({msg:'loadEvent'},'*')
                     }
                     const repos = reposInfo.map(info => info.repo).sort();
                     const repoInfo = reposInfo.find(info => info.repo === app.spec.source.repoURL);
diff --git a/ui/src/app/applications/components/applications-list/applications-list.tsx b/ui/src/app/applications/components/applications-list/applications-list.tsx
index ecf6f787284df..fa34e12e7d5c6 100644
--- a/ui/src/app/applications/components/applications-list/applications-list.tsx
+++ b/ui/src/app/applications/components/applications-list/applications-list.tsx
@@ -611,7 +611,7 @@ export const ApplicationsList = (props: RouteComponentProps<{}>) => {
                                                         isShown={!!appInput}
                                                         onClose={() => {
                                                             if(pathHasOpsmx){
-                                                                window.parent.postMessage(window.btoa(JSON.stringify({msg:'closeEvent'})),'*')
+                                                                window.parent.postMessage({msg:'closeEvent'},'*')
                                                             }
                                                             ctx.navigation.goto('.', {new: null}, {replace: true})}}
                                                         header={
@@ -628,7 +628,7 @@ export const ApplicationsList = (props: RouteComponentProps<{}>) => {
                                                                     qe-id='applications-list-button-cancel'
                                                                     onClick={() => {  
                                                                     if(pathHasOpsmx){
-                                                                     window.parent.postMessage(window.btoa(JSON.stringify({msg:'closeEvent'})),'*')
+                                                                     window.parent.postMessage({msg:'closeEvent'},'*')
                                                                     }
                                                                     ctx.navigation.goto('.', {new: null}, {replace: true})}}
                                                                     className='argo-button argo-button--base-o'>
@@ -647,7 +647,7 @@ export const ApplicationsList = (props: RouteComponentProps<{}>) => {
                                                                         await services.applications.create(app);
                                                                         //iframe msg alert needed
                                                                         if(pathHasOpsmx){
-                                                                            window.parent.postMessage(window.btoa(JSON.stringify({msg:'saveEvent',appName:app['metadata']['name']})),'*')
+                                                                            window.parent.postMessage({msg:'saveEvent',appName:app['metadata']['name']},'*')
                                                                         }
                                                                         ctx.navigation.goto('.', {new: null}, {replace: true});
                                                                     } catch (e) {