The error says "while loading imaging library". That will be LLI32.dll, so presumably it's getting to the stage of starting to load that library. You could try searching for that and see if anything looks wrong.
Otherwise maybe use the old dependency walker program to see if that sheds any light (though if these libraries are loaded with LoadLibrary internally, they may not show up).
Just tried this with my ReportPro 2.30a and got the same result.
Then tried in ReportPro 2.16 and up popped the Graph Wizard.
Then noticed that DLL wasn't in my 2.30a folder so copied the following 4 files from the 2.16 folder to the 2.30a folder and I could then get to the Graph Wizard:
LLI32 is no longer used. LLO32 and LLB32 are both still used.
The ZIP files on our website only included the changed files and were meant to be used like a 'patch'.
That is why the RDDs, VO runtime DLLs, Lightlib DLLs Labels.sys etc are not included.