Uncaught TypeError: Cannot read property ‘indexOf’ of undefined
at Object. (dhtmlx.js:1)
at Object.a.callEvent (dhtmlx.js:1)
at window..init (dhtmlx.js:1)
at listUsersInit (listUsers.js:1290)
and in this part of the code is when i used “indexOf”
I have been searching for a solution for days and it is very difficult for me to understand what may have gone wrong. Any help I appreciate.