I can completely confirm this problem on my Win10 Pro (build 2004) with Maple 2020.1 upgrade.

@acer thanks

@tomleslie Thanks a lot for your answer!!! If I understand well, everything is based only on proper setting of pathdef's. Am I right?

So, there is really nobody who is willing to share any experience regarding this problem?

Oh no, ... Again somebody trying use illeagel copy of Maple 2019 and asking for help here!!??

@Thomas Richard Yes, I understand, but keep installer dependences on 32-bit libraries is a bit old-fashion way in 64-bit era. 

Could you send exact size of your maple.dll file?

@acer This is based on recent experience some of my students. A few of them reports exactly identical problem with cracked Maple 2019.

@acer Thanks for very useful info! Why does the installer not contain all the required libraries in itself?