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

Product Support

puchal October 9, 2026, 1:42pm 5

How did I miss it?

Thank you, I will try to rebuild over the weekend.

Topic		Replies	Views
"Failed to optimize image" error from discourse-topic-previews-sidecar Product Support	7	268	July 30, 2026
Upload avatar image, last version (2.8.0.beta11) - Resolved Bug	2	631	January 19, 2022
Letter avatars still displayed after importing phpbb3 avatars Migration	17	2223	September 27, 2017
Faster (and smaller) uploads in Discourse with Rust, WebAssembly and MozJPEG \| Blog Blog	35	5771	May 13, 2025
Animated Avatar Plugin experimental	59	12635	September 10, 2026

Error when uploading Avatar image

Related topics