Hi Yordan,
Greetings from Syncfusion support,
We have validated the shared sample and unfortunately we are unable to reproduce the reported issue. The pages are loaded inside the splitter pane, and there are no script errors. We have also prepared a video demo of validating the issue from our end.
- Screenshot of the error log you are facing.
If we are able to reproduce the issue from our end, we can validate and provide solution at earliest.
Regards,
Indrajith