You’ve posted in a forum for a product that is in End of Life (EOL) since 2016 as noted here (.rpt Inspector Professional Suite is now in End Of Life (EOL) status, .rpt Inspector Online is its FREE replacement) as well as various parts of the Software Forces website.
.rpt Inspector 3 Professional Suite - the one that is in EOL is no longer supported and it does not support your Crystal Reports 2016 product.
However, our replacement, .rpt Inspector Online does support Crystal Reports 2016 (see the requirements here: Getting started with .rpt Inspector Online) and is currently available for FREE.
You can get a general overview and screenshots here: https://rpt.inspector.tools
I suggest you also review these: