diff --git a/dashboard/src/components/AppInstallDialog.vue b/dashboard/src/components/AppInstallDialog.vue
index e5f42e902..5b6867618 100644
--- a/dashboard/src/components/AppInstallDialog.vue
+++ b/dashboard/src/components/AppInstallDialog.vue
@@ -215,6 +215,7 @@ defineExpose({
   open: async function(appId, version, appCountExceeded, domainList) {
     busy.value = false;
     step.value = STEP.LOADING;
+    formError.value = {};
 
     // give it some time to fetch before showing loading
     const openTimer = setTimeout(dialog.value.open, 200);