Conversion failed. A required codec could not be found or failed to install

Plex Media Server
1

Server Version#: 1.41.4.9463
Player Version#: 4.143.0

Just updated to 1.41.4.9463 and now Plex refuses to play any videos:
Conversion failed. A required codec could not be found or failed to install.

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2

Same issue. Plex updated last night & now not a single video file will play. Audio files start as normal w/n seconds if selected.

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From my logs:

Feb 18, 2025 22:07:09.014 [35680] INFO - [Req#bf/Transcode] CodecManager: obtaining decoder 'h264'

Feb 18, 2025 22:07:09.015 [35680] DEBUG - [Req#bf/Transcode/HCl#39] HTTP requesting GET https://plex.tv/api/codecs/h264_decoder?build=windows-x86_64-standard&deviceId=44eaf3b0-5ef4-4bac-bfdf-c5672f553a00&oldestPreviousVersion=1%2E30%2E2%2E6563-3d4dc0cce&version=8217c1c-4565

Feb 18, 2025 22:07:09.253 [22988] DEBUG - [HttpClient/HCl#39] HTTP/1.1 (0.2s) 429 response from GET https://plex.tv/api/codecs/h264_decoder?build=windows-x86_64-standard&deviceId=44eaf3b0-5ef4-4bac-bfdf-c5672f553a00&oldestPreviousVersion=1%2E30%2E2%2E6563-3d4dc0cce&version=8217c1c-4565 (reused)

Feb 18, 2025 22:07:09.253 [11808] ERROR - [Req#bf/Transcode] Codecs: Failed to download XML for codec 'h264_decoder'

Feb 18, 2025 22:07:09.253 [35680] ERROR - [Req#bf/Transcode] Error configuring transcoder: Decoder install failed: h264

Feb 18, 2025 22:07:09.253 [35680] DEBUG - [Req#bf/Transcode] Streaming Resource: Terminated session 000001717D325B90:xnb07g9y583fva5b4yq8fgr7 with reason Conversion failed. A required codec could not be found or failed to install.

Feb 18, 2025 22:07:09.253 [22800] DEBUG - [Req#bf/Transcode] Killing job.
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4

From Plex codec server:


<Response code="429" status="Limit of devices using codec exceeded"/>
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5

I’ve tried reinstalling a previous version, but it still fails to download the required codecs.

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