78 Errors upon installing PowerPDF from GetIt

[GidiGumDrop]

When installing PowerPDF through GetIt, (Delphi 10.4) and trying to import and create a TStringGrid and export as a PDF using TPRGridPanel. However, when adding powerpdf to uses and creating a TPRGridPanel variable and compiling, I encounter 78 errors from the PReport file. Including:
Undeclared Identifier: "TCustompanel"
Class type required at line 196
Undeclared Identifier: "TControl"
Etc.