If you are using a legacy power app portal (ADX) (not power pages) and suddenly find you are not having content rendered then it may be due to a bug that causes the Default Studio Template to get cleared out and becoming blank.
You will need to update the Default Studio Template Web Template
Here is a snippet that should rescue you!
<!-- Default studio template. Please do not modify --> {% include 'Page Copy' %} |
Side note - you shouldn't edit this template normally so I would avoid opening that record in case once it's fixed
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