Hello everyone.

We have decided to phase out the Mixed Reality Forums over the next few months in favor of other ways to connect with us.

The first way we want to connect with you is our mixed reality developer program, which you can sign up for at https://aka.ms/IWantMR.

The plan between now and the beginning of May is to clean up old, unanswered questions that are no longer relevant. The forums will remain open and usable.

On May 1st we will be locking the forums to new posts and replies. They will remain available for another three months for the purposes of searching them, and then they will be closed altogether on August 1st.

So, where does that leave our awesome community to ask questions? Well, there are a few places we want to engage with you. For technical questions, please use Stack Overflow, and tag your questions using either hololens or windows-mixed-reality. If you want to join in discussions, please do so in the HoloDevelopers Slack, which you can join by going to https://aka.ms/holodevelopers. And always feel free to hit us up on Twitter @MxdRealityDev.

What causes this error: Failed to upload file. Error:[object Object]

Trying to upload a file to a folder on Hololens emulator via Device Portal File Explorer, including to locations I have uploaded to successfully before. Restarting the device did not help.

Best Answer


  • Hello there,

    I know this is an old Topic but I have the same Problem right now. upgrading the Emulator and using Edge instead of (in my case) Chrome doen't seem to solve the problem for me.

    Thanks in advance for every answer.


  • same problem : "Failed to upload file. Error:[object Object]"

  • Hi guy, today I have the same problem on Chrome and Edge !
    But... it works on IE ! Ahah it will never died :)

  • @Juvilnoz said:
    ...the same problem on Chrome and Edge !
    But... it works on IE !

    The same for me.
    Hi Microsoft, there is a bug.

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