Merge pull request #4800 from Rakasch/issue_4797

Update Splitter.vue

components/lib/splitter/Splitter.vue

@@ -331,7 +331,9 @@ export default {
             }
         },
         saveState() {
+            if(ObjectUtils.isArray(this.panelSizes)) {                
                 this.getStorage().setItem(this.stateKey, JSON.stringify(this.panelSizes));
+            }
         },
         restoreState() {
             const storage = this.getStorage();