fix: fix race condition

Author: kulikp1

adminforth/spa/src/components/CustomDateRangePicker.vue

@@ -208,6 +208,10 @@ async function initDatepickers() {
     'flowbite-datepicker/Datepicker'
   );
 
+  if (!datepickerStartEl.value || !datepickerEndEl.value) {
+    return;
+  }
+
   const LS_LANG_KEY = `afLanguage`;
   datepickerStartObject.value = new Datepicker(datepickerStartEl.value, {format: 'dd M yyyy', language: localStorage.getItem(LS_LANG_KEY)});
   datepickerEndObject.value = new Datepicker(datepickerEndEl.value, {format: 'dd M yyyy', language: localStorage.getItem(LS_LANG_KEY)});