This is a Measurement ID, not a Property ID.

Where do I get the GA4 Property ID?

Source / Medium - GA4 Report        Save in GA4  
Source / Medium
Create a custom GA4 'Source / Medium' report and save to your GA4 library. It's the easiest way to create multiple reports across GA4 properties.

GA4Builder only works on desktop, so please come back on a desktop computer to create reports.