For a couple reprository an upgrade gives the following error:
```
Error: TypeError: Cannot convert undefined or null to object
```
[] https://gerrit.wikimedia.org/r/c/mediawiki/extensions/IPInfo/+/1156274
- `element (...) still not displayed after 10000ms`
- `Can't call getText on element with selector (...) because element wasn't found`
[x] https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Newsletter/+/1156276
[x] https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Math/+/1156275
[] https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Popups/+/1156609
- `Error: TypeError: Cannot convert undefined or null to object`
- v8 update ([[ https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Popups/+/1164477 | 1164477 ]]) fails with a different error message: `element (".mwe-popups") still not existing after 10000ms`
[] https://gerrit.wikimedia.org/r/c/mediawiki/extensions/PageTriage/+/1156608
- `TypeError: expect(...).toHaveTextContaining is not a function`
Looking at the trace:
```
11:16:50 [0-0] 2025-06-12T09:16:50.292Z ERROR @wdio/runner: Error: Unable to load spec files quite likely because they rely on `browser` object that is not fully initialized.
11:16:50 [0-0] `browser` object has only `capabilities` and some flags like `isMobile`.
11:16:50 [0-0] Helper files that use other `browser` commands have to be moved to `before` hook.
11:16:50 [0-0] Spec file(s): file:///workspace/src/extensions/Newsletter/tests/selenium/specs/basic.js
11:16:50 [0-0] Error: TypeError: Cannot convert undefined or null to object
11:16:50 [0-0] at exports.unloadFile (/workspace/src/extensions/Newsletter/node_modules/mocha/lib/nodejs/file-unloader.js:14:32)
11:16:50 [0-0] at Mocha.unloadFile (/workspace/src/extensions/Newsletter/node_modules/mocha/lib/mocha.js:476:44)
11:16:50 [0-0] at /workspace/src/extensions/Newsletter/node_modules/mocha/lib/mocha.js:504:11
11:16:50 [0-0] at Array.forEach (<anonymous>)
11:16:50 [0-0] at Mocha.unloadFiles (/workspace/src/extensions/Newsletter/node_modules/mocha/lib/mocha.js:503:14)
11:16:50 [0-0] at Suite.<anonymous> (/workspace/src/extensions/Newsletter/node_modules/@wdio/mocha-framework/build/index.js:194:43)
11:16:50 [0-0] at Suite.emit (node:events:524:28)
11:16:50 [0-0] at Suite.emit (node:domain:489:12)
11:16:50 [0-0] at /workspace/src/extensions/Newsletter/node_modules/mocha/lib/mocha.js:455:13
11:16:50 [0-0] at exports.loadFilesAsync (/workspace/src/extensions/Newsletter/node_modules/mocha/lib/nodejs/esm-utils.js:104:5)
11:16:50 [0-0] at MochaAdapter._loadFiles (/workspace/src/extensions/Newsletter/node_modules/@wdio/mocha-framework/build/index.js:214:29)
11:16:50 [0-0] at async MochaAdapter.init (/workspace/src/extensions/Newsletter/node_modules/@wdio/mocha-framework/build/index.js:195:5)
11:16:50 [0-0] at async Object.adapterFactory.init (/workspace/src/extensions/Newsletter/node_modules/@wdio/mocha-framework/build/index.js:334:20)
```
The problem happens when it tried to load spes file and the file gets an `TypeError: Cannot convert undefined or null to object`. I think that error happens within core the we use our API code, but there's no good stack trace.