Here is info about this Error. 3. http://www.wiki-errors.com/err.php?wiki=506
1.But before traying this please try to use the Creative Cloud Cleaner Tool to solve installation issues and install Adobe xd again.
2, try to reinstall CC App
The 506 error is the numerical value of the error occurred. The error number is one of the value to identify the error. It holds information about the error, the possible cause of the error, the action that caused the error. Error numbers was used to address the errors in the common error code format used by windows and other windows compatible software and driver vendors.
This 506 error code is used by the vendor to identify the error caused. This 506 error code has a hexadecimal number and a technical description linked to it. In some cases the error may have more parameters in hexadecimal format which represents the memory locations where the instruction(s) was loaded at the time of the error. The system.ini file contains the listing of error codes used in Windows operating system and supporting software and drivers..
The 506 error may be caused by windows system files damage. The corrupted windows system files entries can be a real threat to the well being of your computer.
There can be many events which may have resulted in the system files errors. An incomplete installation, an incomplete uninstall, improper deletion of applications or hardware. It can also be caused if your computer is recovered from a virus or adware/spyware attack or by an improper shutdown of the computer. All the above actives may result in the deletion or corruption of the entries in the windows registry. This corrupted registry will lead to the missing and wrongly linked information and files needed for the proper working of the application.