Old images' thumbnails are not displayed in Google Chrome
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Issue
- Some thumbnails related to images created a long time ago are not displayed in Chrome, but they can be displayed in Firefox.
- When inspecting the request through the Developer Tools, there is one of following messages depending on the version of the protocol HTTP in use:
- ERR_QUIC_PROTOCOL_ERROR
- ERR_HTTP2_PROTOCOL_ERROR
- ERR_CONTENT_LENGTH_MISMATCH
Resolution
- The root cause is that the size set in the HTTP header of the thumbnail file is not equal to the real size of the fetched file.
- The solution is to regenerate these thumbnails either by re-adding a new version of the original image or by using the script attached to this article in Control Panel > Configuration > Administration Server > Script to check and regenerate all of the thumbnails with mismatched sizes.
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