Hi, All users when they try to upload an image to replace current avatar get an error: undefined method ‘optimized_image_resize_instructions’ for class OptimizedImage Upload of other images (for gallery, or just plain image) works ok. I am not sure when it started, we have relatively small commun…

Which version of Discourse are you running? Do you have any plugins installed?

v2026.9.0 . I have a few plugins: Bbcode color Nationalflags (This is a fork from here GitHub - chapoi/discourse-nationalflags: National Flags plugin for Discourse · GitHub ), original is no longer mainyained) Topic previews sidecar Thank you.

[image] puchal: Topic previews sidecar See this post and the few posts below it

How did I miss it? :smiley: Thank you, I will try to rebuild over the weekend.

Error when uploading Avatar image

Support

RGJ (Richard - Communiteq) October 9, 2026, 6:35am 4

See this post and the few posts below it

Topic		Replies	Views
"Failed to optimize image" error from discourse-topic-previews-sidecar Support	7	244	July 30, 2026
Upload avatar image, last version (2.8.0.beta11) - Resolved Bug	2	616	January 19, 2022
Letter avatars still displayed after importing phpbb3 avatars Migration	17	2210	September 27, 2017
Faster (and smaller) uploads in Discourse with Rust, WebAssembly and MozJPEG \| Blog Blog	35	5700	May 13, 2025
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Error when uploading Avatar image

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