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Portals error when using PCF

I know it is in preview but we are unable to diagnose how to fix an error because there isn't enough details.  We are trying to implement our own Dropdown control that functions like a dependent optionset.  I have attached the manifest as a zip file since it doesn't allow .xml.  We are getting the following error.



  • The portal version is
  • The portal solution is 9.3.2109.20
  • We have followed all the steps in The Tutorial 
  • We have tested it using the out of the box input mask for single line of text and that works.



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