Dynamics Community Forum Thread Details

BC v27 Preview Print button not working in browser – Fetch API cannot load blob

Does anybody faced this issue?

We are experiencing an issue in Business Central SaaS (version 27.4) where the Print button inside the document preview does not work.

Steps to reproduce:
1. Open any Sales Order (or any document)
2. Click Print → Preview
3. In the preview window, click the printer icon

Result:
Nothing happens.

Expected:
Browser print dialog should open.

Additional findings:
- Preview loads correctly (PDF is rendered)
- Right-click → Print works
- Ctrl+P works (but not acceptable due to formatting issues)
- Print button in UI does nothing

Developer console shows error:

"Fetch API cannot load blob:https://businesscentral... URL scheme 'blob' is not supported."
"Not allowed to load local resource: blob:..."

This indicates that the BC print service is trying to fetch a blob URL, which is blocked by modern Chromium-based browsers (Edge and Chrome).

Environment:
- Business Central SaaS (FI localization)
- Version: 27.4 (Platform 27.0.x)
- Browsers tested:
- Microsoft Edge (latest) – issue persists
- Google Chrome (latest) – issue persists
- InPrivate/Incognito – issue persists

Conclusion:
This appears to be a compatibility issue between BC v27 web client print implementation and modern browser security restrictions (CORS / blob handling).

Categories:

Dynamics 365 Business Central

Hello,
yes, this looks more like a BC web client/browser compatibility bug than a report layout or printer setup issue, especially since the PDF preview renders correctly and browser-level print options still work. In standard BC, Microsoft says the preview toolbar should support Download and Print, and when the printer is Handled by the browser, the browser print dialog should open; so if the preview print icon does nothing and the console shows blocked blob: fetch/load errors in both Edge and Chrome, I would log this with Microsoft Support as a product issue for BC SaaS v27.4 / platform 27 and include the browser console errors, tenant/environment, localization, exact version, and a HAR trace. As a workaround, users can download the PDF and print it, use right-click print where formatting is acceptable, or configure Universal Print / Email Print if direct BC printing is needed, but I would not spend much time changing AL/report layouts unless only one custom report is affected.

Regards,
Oussama Sabbouh

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