Sometimes the DLL is present but unregistered. After reinstalling Adobe:
regsvr32 "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\axacropdflib.dll" axacropdflib.dll download
For developers: If you need to distribute an app that relies on axacropdflib.dll , include the Adobe Acrobat Reader bootstrapper in your installer – never redistribute the DLL alone. Sometimes the DLL is present but unregistered