Description
Due to a problem in the Intel® Quartus® Prime Pro Edition Software version 20.2 for Windows* 10, you may see this internal error when the fitter stage is being executed.
The internal error description includes a DLL module that could not be found by the Windows* 10 operating system. e.g.
ERROR: Can't load library: <Quartus_install_directory>\20.2\quartus\bin64\fitter_fdrgn.dll.
The operating system reports the following error: The specified module could not be found.
Resolution
To work around this problem, install the Visual C Redistributable Packages for Visual Studio 2013 from the link.