Overview of the issue

The ecosystem CI for storybook is catching some regression, I'm unsure if it's on compodoc's side or somewhere else.

5 hours ago a new asndbox was generated (it's automated every 24h):
storybookjs/sandboxes@1cedd2d

This shows us the change: compodoc was upgraded to:
https://github.com/compodoc/compodoc/releases/tag/1.1.27

Then our ecosystem CI tries to bootstrap storybook on top of the sandbox, as well as generate a storybook static build.
This fails:
https://app.circleci.com/pipelines/github/storybookjs/storybook/103879/workflows/2a8f97f7-0fc3-49e6-9a8e-978d431bb698/jobs/889804/parallel-runs/16?filterBy=FAILED

The full error:

1.1.27

TypeScript version used by Compodoc : 5.8.3
TypeScript version of current project : 5.9.2
Node.js version : v22.15.0
Operating system : Linux 6.8

[07:28:42] No configuration file found, switching to CLI flags.
[07:28:42] Using provided source folder
[07:28:42] Using tsconfig file : /tmp/storybook/sandbox/angular-cli-default-ts/tsconfig.json
[07:28:42] Including      : /tmp/storybook/code/addons/vitest/template/stories/basics.stories.ts
[07:28:42] Including      : /tmp/storybook/code/addons/vitest/template/stories/unhandled-errors.stories.ts
[07:28:42] TypeError: i18next.init is not a function
[07:28:42] Sorry, but there was a problem during parsing or generation of the documentation. Please fill an issue on github. (https://github.com/compodoc/compodoc/issues/new)
    at makeError (/tmp/storybook/scripts/node_modules/execa/lib/error.js:59:13)
    at handlePromise (/tmp/storybook/scripts/node_modules/execa/index.js:119:50)
    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
    at async /tmp/storybook/scripts/combine-compodoc.ts:44:7
    at async Promise.all (index 5)
    at async run (/tmp/storybook/scripts/combine-compodoc.ts:40:21)

This is what line 40 of our combine-compodoc.ts looks like:
https://github.com/storybookjs/storybook/blob/b7c4b0bbaeffebfb07d3a8f47095d7303a1b1a10/scripts/combine-compodoc.ts#L45

Operating System, Node.js, npm, compodoc version(s)

1.1.27

TypeScript version used by Compodoc : 5.8.3
TypeScript version of current project : 5.9.2
Node.js version : v22.15.0
Operating system : Linux 6.8

Angular configuration, a package.json file in the root folder

https://github.com/storybookjs/sandboxes/blob/1cedd2d1f7e36fd8996cdf3ed3063eaf84aef600/angular-cli/default-ts/after-storybook/package.json

Compodoc installed globally or locally ?

Locally

If possible sourcecode of the file where it breaks

I don't have a lot to go on, but I did a search for i18next.init in our codebases, and wasn't able to find anything, but it does show up in yours:
https://github.com/search?q=repo%3Acompodoc%2Fcompodoc%20i18next.init&type=code

If possible your terminal logs before the error

Link to the CI workflow log:
https://app.circleci.com/pipelines/github/storybookjs/storybook/103879/workflows/2a8f97f7-0fc3-49e6-9a8e-978d431bb698/jobs/889804/parallel-runs/16?filterBy=FAILED

Motivation for or Use Case

This is blocking Storybook's ecosystem CI, blocking releases.

Reproduce the error

This is essentially what the ecosystem CI does:

• Download the after-storybook dir from the sandboxes repository.
• Install dependencies
• Run the build-storybook command

Related issues

I did search for the error message before opening this ticket, but neither i18next.init nor a substring yielded any open issues.

Suggest a Fix

Sorry, that's out of my depth.
I'd be happy to make tweaks to our ecosystem CI setup if that helps work out what the problem is.