There was an error opening the file Legal Reg Change Concept v2.xd (Error code: 86) This is not a valid XD document.
I am using XD Version 18.104.22.168 x64 (Starter) on MacOS Big Sur Version 11.6.5 (20G527). The files were created in XD and stored on Google Drive. Very frustrating to not be able to reopen files created by that application.
We're so sorry to hear about the trouble. Please try downloading the file to your computer and then try opening the file from there and check if you are able to open the file. If that doesn't work as well, will it be possible for you to share the file with us? If yes, please add the file to a shared location like Google Drive or DropBox and share the link with me by clicking on my name.