Any idea what causes this? Never had it happen before. Happens when trying to install from any source.

I think this one solved here :slightly_smiling_face: [image] FKB Pro - Social theme Theme Hello wave Is this your fork? https://github.com/GitHubQueenn/fkb-pro-theme2 It seems you created a stylesheets folder which duplicates the scss folder files. This …

Could you check /logs after trying to add one?

Failed to process hijacked response correctly : ActiveRecord::RecordNotUnique : PG::UniqueViolation: ERROR: duplicate key value violates unique constraint “theme_field_unique_index” DETAIL: Key (theme_id, target_id, type_id, name)=(50, 5, 1, common/fkb-c-alternative-voting-category) already exis…

Ah, this seems similar to an issue I already reported then: [image] Failing to add a theme permanently prevents that theme from being added Message Failed to process hijacked response correctly : ActiveRecord::RecordNotUnique : PG::UniqueViolation: ERROR: duplicate key value violates unique co…

So, the original theme I use was on a GH repository. GH messed with the account I had it on, so I put it on another account and tried uploading it and then was getting this error.

So is the theme already on your instance? If that’s the case, does removing the old one help?

Well, I’m afraid to remove it since this one won’t install and then have no theme at all, haha.

Ha, no I completely get that. Just for a sanity thing, could you try renaming your current theme, and then re-import the new one? (I don’t expect this to change anything, but it can’t hurt)

Last idea before I leave this to someone who knows more than me, could you try renaming the theme in the theme’s about.json?

Yeah, same issue. So weird. I guess the 500 Error issue you got in January wasn’t resolved then? Or is there any way to just change the theme ID? I would’ve thought Discourse would automatically make that happen on import so that something like this doesn’t happen Oh wait, in the error log, it look…

500 Error when trying to install theme

Development

Firepup650 (Firepup Sixfifty) April 5, 2024, 10:35pm 16

Hm… that’s a potential lead, try changing things one by one, and see what breaks?

Topic		Replies	Views
Importing or creating a theme causes a 500 error Product Support	3	1042	July 17, 2018
Failing to add a theme permanently prevents that theme from being added Bug	4	567	April 6, 2024
Error installing theme from Github Self-hosting	4	379	July 18, 2025
Theme/component installation error Development	6	1089	February 8, 2022
Getting a '500' error when trying to install Product Support custom-header-links	17	1656	September 13, 2023

500 Error when trying to install theme

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