Unable to show my own html code

I add an HTML element in the app and put my html code there.

I can see it works in the development panel. But when I preview it no matter in debug mode or live mode, the element doesn’t show anything and a general error occurs saying “Sorry, we have encountered an unexpected error. Please file a bug report (Help -> Report a bug), including error code 1574418769497x319916828422497340 and a step-by-step explanation of how to reproduce this issue.”

I upload my files in the bubble’s database, and they are just small files.