diff --git a/frontend/src/components/widget/DeWidget/DeNumberRange.vue b/frontend/src/components/widget/DeWidget/DeNumberRange.vue
index d3340508dd..604be92167 100644
--- a/frontend/src/components/widget/DeWidget/DeNumberRange.vue
+++ b/frontend/src/components/widget/DeWidget/DeNumberRange.vue
@@ -24,7 +24,7 @@
{{ $t('denumberrange.split_placeholder') }}
0 && this.attrs.parameters[0].indexOf('|DE|') === -1) {
+ if (this.attrs.parameters?.length && this.attrs.parameters[0].indexOf('|DE|') === -1) {
const parameters = []
for (var i = 0; i < this.attrs.parameters.length; i++) {
if (this.attrs.parameters[i].indexOf('|DE|') === -1) {