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Sorry to hear about the trouble. Please try the steps shared here: https://community.adobe.com/t5/adobe-xd/unable-to-open-the-local-file-in-xd-getting-error-86/m-p/105...
If this doesn't help, will it be possible for you to share the file with us? If yes, please add the file to shared cloud storage, and then you can DM me the link by clicking on my name.
Note: While sending a DM, please add this discussion link in the subject.