Having problem starting plotly in windows

Hei, I have used plotly regularly in windows. Last two days, I can not use due to the error below. It would be great if you could have any suggestion.

Failed to install dependencies for environment ‘application_backend’. stdout: stderr: Resolved 52 packages in 7ms × Failed to download `dash-embedded==3.0.0` ├─▶ Failed to read from the distribution cache ╰─▶ failed to query metadata of file `C:\Program Files\Plotly Studio\resources\dash_embedded-3.0.0-py3-none-any.whl`: The system cannot find the file specified. (os error 2) help: `dash-embedded` (v3.0.0) was included because `plotly-studio-project` (v0.1.0) depends on `dash-embedded`

hi @Akin
Are you using Plotly Studio? When do you get this error? When you first load your app or when you log in?

Hei,

Yes, I use Plotly Studio in windows. I think I set up around December as first time. It worked well.

Now, I started using it, however, it did not worked.

I have setup plotly in another window computer now. It worked well. So the problem is related to my current computer.

Resetup is not working. I think I need to clean some files. Or could you have any suggestions?

Thanks for your prompt reply. Best regards

Akin

hey Akin,
I’ll message you directly to see how we can solve this.

Hei Again,

Please find two screenshoots. First is when I started the plotly. Second is when I log in the system, which presistant.

Best

Akin

@adamschroeder I am also getting the same error. I have uninstalled and reinstalled plotly, restarted my computer, and still get this when I load up Plotly Studio:

Failed to install dependencies for environment ‘application_backend’. stdout: stderr: Resolved 52 packages in 11ms × Failed to download `dash-design-kit==2.2.3` ├─:play_button: Failed to read from the distribution cache ╰─:play_button: failed to query metadata of file `C:\Program Files\Plotly Studio\resources\dash_design_kit-2.2.3-py3-none-any.whl`: The system cannot find the file specified. (os error 2) help: `dash-design-kit` (v2.2.3) was included because `plotly-studio-project` (v0.1.0) depends on `dash-design-kit`

Thanks for reporting, @bpanos

@nathandrezner , @Robert_Claus any idea what’s going on here? Would you like me to open a ticket for this?

Hi @bpanos
Our Engineering team is aware of this, and they have confirmed that they have seen other users with this particular issue. The bug fix is in the sprint queue and will be addressed this week. It will likely be a few days before the release with the fix ships, however. In the meantime, if you have any questions, please let me know.

Hi Adam, I also having similar issues here

"Failed to start backend server: “Failed to sync backend dependencies: Resolved 141 packages in 629ms\nPrepared 1 package in 2ms\nerror: failed to remove file `C:\\Users\\xxxx\\AppData\\Roaming\\com.plotly.studio\\environments\\application_backend\\.venv\\Lib\\site-packages\\../../Scripts/server.exe`: The process cannot access the file because it is being used by another process. (os error 32)”

@javorca can you check if you have a virtual environment or Dash app running anywhere else in your machine?
Do you have another Dash app open? or VS Code?

Hi adam, no.. i just started the plotly app..

hi @javorca ,
i believe this was fixed in the last Plotly Studio update. Please try to update to the latest version. If this error continues, please message me directly and I will get you the support you need to solve this as quickly as possible.

I tried to load up Plotly Studio after attending today’s webinar. I am on a Macbook pro and seeing this error. The version of Plotly Studio that I have installed is 0.0.79 (0.0.79)

Failed to install dependencies for environment ‘application_backend’. stdout: stderr: Resolved 143 packages in 274ms × Failed to download `src-backend==0.1.0+b20260514183604` ├─:play_button: Failed to read from the distribution cache ╰─:play_button: failed to query metadata of file `/Applications/Plotly Studio.app/Contents/Resources/resources/src_backend-0.1.0+b20260514183604-py3-none-any.whl`: No such file or directory (os error 2) help: `src-backend` (v0.1.0+b20260514183604) was included because `plotly-studio-backend` (v0.1.0) depends on `src-backend`

hi @a-a-ron ,
it’s likely because of the very old version of Plotly Studio you have (thank you for being with us since the beginning.)

Try shutting the app down, delete the app data directory, and then open the app again, and it should recover.

Thanks @adamschroeder! I sometimes forget that Macs can lazily delete apps. I had tried deleting and redownloading but did not do a full delete when doing so.

Did it work at the end?

Yeah it’s working now.

Thanks again and have a great weekend.