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Sandbox Publishing issue

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Posted on by CU22040547-0

"I’m trying to publish the sandbox in Microsoft Business Central (cloud-based). It keeps showing 'Sending request' but doesn't complete or return any error. What could be causing this issue?"

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Dynamics 365 Business Central

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Matteo Fiocco 260 on at

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Hey, looks like you're stuck at the "Sending request" stage when trying to publish to your cloud sandbox in Dynamics 365 Business Central. I've run into that before too – super annoying.

A few things you can try:

Clear the credential cache. The message hints that cached credentials might be the issue. In VS Code, press Ctrl+Shift+P and run "AL: Clear Credential Cache". Then try publishing again – it should prompt you to sign in.

Check for extension dependencies. If your extension depends on other apps that aren't published or referenced correctly, it can hang silently. Double-check your app.json and make sure all dependencies are either already installed or packaged properly.

Try publishing without debugging. Sometimes the debugger causes issues. Use "AL: Publish Without Debugging" from the command palette.

Cloud sandbox slowness. If you're using a shared cloud sandbox, sometimes it just gets stuck due to server-side issues. Try restarting VS Code, reconnecting to the environment, or waiting a few minutes and trying again.

Clean and rebuild the project. Run "AL: Clean", rebuild the solution, and make sure your launch.json is correctly targeting the right environment.

If you're still stuck, feel free to share your app.json or launch.json and I can help look into it further.

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YUN ZHU 95,647 Super User 2025 Season 2 on at

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Is there an error when downloading the symbol files?

In any case, you need to confirm the environment settings in launch.json first.

For example,

Then update AL Language to the latest released version.

Hope this helps.

Thanks.

ZHU

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CU22040547-0 16 on at

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Thanks for the Responses. I have Tried All the suggested Conditions. and I would like to share the outcome.
-The Project in which this issue was Raised is standing on the same stage (still not Publishing), but i can publish as(PTE).

- I have tried to create new testing project as a second extension and used the same app.json(same dependencies, Runtime & Application Version) & launch.json and i was able to Publish this Project as both (DEV & PTE).

the Previous Project Contains 1130 Object Files. is the issue related to bulkiness in the project & slowing the publish request?

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KP - Solution Archi... 658 on at

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Hi,

We have recently published a blog that automatically generates the launch.json new feature of Business Central.

Use that launch.json file to download symbols and then try to publish the app.

Additionally, check if the tenant ID is specified in the launch.json file.

https://madhda.com/it-blog/how-to-generate-launch-json-in-business-central-v26-web-client/

Let me know if this helped you.

Thanks,

KP

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Tech-Lucky 1,267 Super User 2025 Season 2 on at

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Hi there,

I've seen many experts share some great troubleshooting steps, and you should definitely give those a try first.

If you're still facing issues, consider switching your AL extension version to the Pre-Release. In the screenshot below, you'll see that I’ve already switched to the Pre-Release version—so in my case, it shows the option to "Switch to Release Version."

Give it a shot and see if that resolves the issue!

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Gerardo Rentería Ga... 25,225 Most Valuable Professional on at

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Hi, good day
I hope this can help you, and give you some hints.

How to publish an Extension App to a Customer Sandbox via Visual Studio Code · Issue #3991 · microsoft/AL

Best Regards
Gerardo

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YUN ZHU 95,647 Super User 2025 Season 2 on at

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Is there a lot of processing in the install codeunit or upgrade codeunit?
I have handled large projects before, but I have never encountered this problem.

However, if the SaaS version is slow to respond, it is recommended that you develop with the Docker version, which will not be affected by the network and Microsoft servers locally.

Hope this can give you some hints.

Thanks.

ZHU

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Khushbu Rajvi. 20,441 Super User 2025 Season 2 on at

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Please check this: https://www.dynamicsuser.net/t/bc-24-sandbox-issue/80638

https://madhda.com/it-blog/how-to-generate-launch-json-in-business-central-v26-web-client/

https://divyeshchittenavbc.wordpress.com/2021/07/28/you-do-not-have-the-following-permissions-on-tabledata-published-application-indirectinsert-in-business-central-msdyn365bc/

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