yes indeed, I was being a bit succint.
that browser supports grid-lanes but it’s behind a “experimental” flag.
the warning is harmless and once they move that feature to their main line it will go away.
currently the only browser that supports it without setting an experimental feature flag is …
… Safari! (who would have thought Apple to be first with a standard? 
)
If Horizon was less opinionated and less monolithic, you would end up with something like this:
This is a very rough fork of Horizon without the overbearing elements and CSS with TLP and Bars! so that the latter two can do their thing unimpeded.
Obviously this needs a bit of refinement …
early in the morning today we noticed avatars can’t be changed.
Logs tell me this: no implicit conversion of Hash into String:
hostname web1-app, [web2-app]
process_id 815
application_version bfe7896ce82d26b70b70d8e6470330331eacd0ab
HTTP_HOST redacted
REQUEST_URI /posts
REQUEST_METHOD POST
HTTP_USER_AGENT Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:153.0) Gecko/20100101 Firefox/153.0
HTTP_ACCEPT */*
HTTP_REFERER https://redacted/
HTTP_X_FORWARDED_FOR redacted
username VladSv
error_message no implicit conversion of Hash into String
instructions convert, [png:/var/www/discourse/tmp/download_cache/dfae3db8fee87a3abc7ad00830e917bab294253e.png[0], -auto-orient, -gravity, center, -background, transparent, -thumbnail, 1024x576^, -extent, 1024x576, -interpolate, catrom, -unsharp, 2x0.5+0.7+0, -interlace, none, -profile, /var/www/discourse/vendor/data/RT_sRGB.icm, png:/tmp/discourse-thumbnail20260808-815-ftpz9a.png]
time 11:26 am
location
upload_id 538657
Message (16783 copies reported)
Failed to optimize image: unknown reason
Backtrace
/var/www/discourse/lib/discourse.rb:1115:in 'block in Discourse.warn'
/var/www/discourse/lib/discourse.rb:1109:in 'Array#each'
/var/www/discourse/lib/discourse.rb:1109:in 'Discourse.warn'
/var/www/discourse/app/models/optimized_image.rb:362:in 'OptimizedImage.convert_with'
/var/www/discourse/plugins/discourse-topic-previews-sidecar/lib/topic_previews/optimized_image_extension.rb:24:in 'TopicPreviews::OptimizedImageExtension#optimize'
/var/www/discourse/app/models/optimized_image.rb:317:in 'OptimizedImage.resize'
/var/www/discourse/app/models/optimized_image.rb:114:in 'block in OptimizedImage.create_for'
/var/www/discourse/app/models/optimized_image.rb:19:in 'block (2 levels) in OptimizedImage.lock'
/var/www/discourse/lib/distributed_mutex.rb:53:in 'block in DistributedMutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:49:in 'Thread::Mutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:49:in 'DistributedMutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:34:in 'DistributedMutex.synchronize'
/var/www/discourse/app/models/optimized_image.rb:19:in 'block in OptimizedImage.lock'
/var/www/discourse/lib/distributed_mutex.rb:53:in 'block in DistributedMutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:49:in 'Thread::Mutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:49:in 'DistributedMutex#synchronize'
/var/www/discourse/lib/distributed_mutex.rb:34:in 'DistributedMutex.synchronize'
/var/www/discourse/app/models/optimized_image.rb:18:in 'OptimizedImage.lock'
/var/www/discourse/app/models/optimized_image.rb:82:in 'OptimizedImage.create_for'
/var/www/discourse/app/models/upload.rb:162:in 'Upload#get_optimized_image'
/var/www/discourse/app/controllers/user_avatars_controller.rb:238:in 'UserAvatarsController#get_optimized_image'
/var/www/discourse/app/controllers/user_avatars_controller.rb:138:in 'UserAvatarsController#show_in_site'
/var/www/discourse/app/controllers/user_avatars_controller.rb:91:in 'block (2 levels) in UserAvatarsController#show'
/var/www/discourse/lib/hijack.rb:68:in 'BasicObject#instance_eval'
/var/www/discourse/lib/hijack.rb:68:in 'block (2 levels) in Hijack#hijack'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/i18n-1.14.8/lib/i18n.rb:354:in 'I18n::Base#with_locale'
/var/www/discourse/lib/hijack.rb:68:in 'block in Hijack#hijack'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/concurrent-ruby-1.3.7/lib/concurrent-ruby/concurrent/promises.rb:911:in 'Concurrent::Promises::Event#callback_on_resolution'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/concurrent-ruby-1.3.7/lib/concurrent-ruby/concurrent/promises.rb:797:in 'Concurrent::Promises::AbstractEventFuture#call_callback'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/concurrent-ruby-1.3.7/lib/concurrent-ruby/concurrent/promises.rb:803:in 'Concurrent::Promises::AbstractEventFuture#call_callbacks'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/concurrent-ruby-1.3.7/lib/concurrent-ruby/concurrent/promises.rb:692:in 'Concurrent::Promises::AbstractEventFuture#resolve_with'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/concurrent-ruby-1.3.7/lib/concurrent-ruby/concurrent/promises.rb:1325:in 'Concurrent::Promises::ResolvableEvent#resolve'
/var/www/discourse/lib/scheduler/defer.rb:135:in 'block in Scheduler::Deferrable#do_work'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rails_multisite-7.0.0/lib/rails_multisite/connection_management/null_instance.rb:49:in 'RailsMultisite::ConnectionManagement::NullInstance#with_connection'
/var/www/discourse/vendor/bundle/ruby/3.4.0/gems/rails_multisite-7.0.0/lib/rails_multisite/connection_management.rb:17:in 'RailsMultisite::ConnectionManagement.with_connection'
/var/www/discourse/lib/scheduler/defer.rb:130:in 'Scheduler::Deferrable#do_work'
/var/www/discourse/lib/scheduler/defer.rb:116:in 'block (2 levels) in Scheduler::Deferrable#start_thread'
This looks like an issue with the TLP sidecar I’ll take a look
This looks like a compatibility issue with core … I’ll fix it for the pro version of the sidecar
This should be resolved by https://github.com/merefield/discourse-topic-previews-sidecar-pro/pull/183
Thanks, this fixed the issue.
There’s now a vastly improved Featured Images presentation option - “Carousel”.
See https://www.starzen.space/ for a demo
I get this kind of error in console (latest version TLP)
app.js:69 Failed to load theme 30 from https://xxx/theme-javascripts/40a50061299ae50a5bf470c83f9d3db199a93387.js Error: Could not find module `discourse/ui-kit/modifiers/d-pointer-drag` imported from `(require)`
at fae (loader.js:253:13)
at Bp (loader.js:266:5)
at window.requirejs.window.require.window.requireModule (loader.js:24:17)
at chunk-ln9q81id.digested.js:1:999
at Object.lookup (app.js:56:5)
at 40a50061299ae50a5bf470c83f9d3db199a93387.js?__ws=xxxxxxx:1:2134
loadThemeFromModulePreload @ app.js:69
await in loadThemeFromModulePreload
loadThemesAndPlugins @ app.js:127
(anonymous) @ discourse.js:21
await in (anonymous)
(anonymous) @ discourse.js:25
app.js:365 ℹ️ Discourse v2026.7.0-latest — https://github.com/discourse/discourse/commits/f1dcbb24e0 — Ember v6.10.1
client-error-handler.js:109 [THEME 30 'Topic List Previews'] Error: Could not find module `discourse/ui-kit/modifiers/d-pointer-drag` imported from `(require)`
at fae (loader.js:253:13)
at Bp (loader.js:266:5)
at window.requirejs.window.require.window.requireModule (loader.js:24:17)
at chunk-ln9q81id.digested.js:1:999
at Object.lookup (app.js:56:5)
at 40a50061299ae50a5bf470c83f9d3db199a93387.js?__ws=xxx:1:2134
reportToConsole @ client-error-handler.js:109
reportThemeError @ client-error-handler.js:56
(anonymous) @ client-error-handler.js:22
constructor @ client-error-handler.js:22
create @ core.js:583
create @ registry-BJpQx6hv.js:400
instantiateFactory @ registry-BJpQx6hv.js:292
lookup @ registry-BJpQx6hv.js:238
lookup @ registry-BJpQx6hv.js:131
lookup @ container_proxy.js:27
initialize @ boot-services.js:3
(anonymous) @ index.js:375
(anonymous) @ index.js:183
(anonymous) @ index.js:112
(anonymous) @ index.js:59
(anonymous) @ index.js:65
_runInitializer @ index.js:388
runInstanceInitializers @ index.js:373
_bootSync @ instance.js:111
didBecomeReady @ index.js:780
invoke @ index.js:262
flush @ index.js:180
flush @ index.js:334
_end @ index.js:762
(anonymous) @ index.js:499
Promise.then
(anonymous) @ index.js:18
flush @ index.js:29
_scheduleAutorun @ index.js:928
_ensureInstance @ index.js:919
schedule @ index.js:618
schedule @ index.js:343
waitForDOMReady @ index.js:508
init @ index.js:408
initialize @ core.js:97
create @ core.js:599
(anonymous) @ discourse.js:23
await in (anonymous)
(anonymous) @ discourse.js:25
You need to be on at least v2026.8.0 
I do not tend to support older builds, but I’ll add a pin.
Done, but given it’s tricky for you to roll back, if you can just upgrade to at least v2026.8.0 (or v2026.9.x-latest) that would be simplest I think.