[Support Request] SOURCE_ERROR 1200 on Firefox 137 (Windows Only)

[nickchen]

Hi Bitmovin Support Team,

We’ve encountered a platform-specific issue with Bitmovin Player where playback fails only on Firefox 137 on Windows.

When attempting to play a DASH stream with Widevine DRM, the player throws the following error:

Additional context:

• Playback works fine on Chrome, Edge, and Safari
• Firefox Private Browsing mode works fine
• The issue only happens on Firefox 137 in normal mode on Windows
• We’re currently using Bitmovin Player version 8.169.0

Could you please advise if this is a known issue or potentially related to recent changes in Firefox or Bitmovin? Is there any recommended workaround or upcoming fix?

Thank you in advance!

Best regards,
Nick

[Kishore]

Hi @nickchen,

Thank you for reaching out to us. This seems to be related to issues in the CDM module and could also be caused by browser compatibility problems. Is this occurring on a specific system, or are you able to reproduce it across multiple systems with the same version? If not, I recommend testing on a different system and checking for any updates or patches that may be available and applying them.