Running the script from & # 39; * .js & # 39; was rejected because the MIME type (& # 39; image / png & # 39;) is not executable.

Hello

The website worked fine. It often does not work properly in the last month.
However, the script loads properly into the Hawkhost support team. They sent me a picture of the script as a screenshot.

But for me it is displayed as a picture. A green shield with a check mark.

The website will not load because it was created with "reacts".

How do I solve the problem? What is the reason for that?
Why is the mime type image / png?

1. No problem with Hawkhost
2. I have not changed anything in the script

What is the cause of the problem then?

Please tell me how to track down the problem.