I’m not sure about this problem.
Can you check which reader is used in SNAP Desktop when you open it there?
Open the Information Windows (in menu Analysis) and select the product.
Please post a screenshot of this window.
Also helpful could be this information for you. You might need to specify the libraries manually.
For snappy you need to add the two properties to the snappy.ini file.
java_options: -Dncsa.hdf.hdflib.HDFLibrary.hdflib=c:\path\to\jhdf.dll -Dncsa.hdf.hdf5lib.H5.hdf5lib=c:\path\to\jhdf5.dll
Add this line with updated paths to the libraries