Catch exception

Google Apps Script version/TangMo_fxtwitter_bot.gs

@@ -1,5 +1,6 @@
 function doPost(e) {
-  const contents = JSON.parse(e.postData.contents);
+  let contents = {};
+  try { contents = JSON.parse(e.postData.contents); } catch {}
   if (contents.message?.media_group_id || !contents.message?.text) {
     return;
   }