How to upload a file to a form (Site is using Lando/Docker)

[retrodans]

I am having trouble uploading a jpg file into a Drupal form, and cannot work out why, or how best to debug it, the snippets of code around this look like:

Get and test the file

let path = require("path").resolve(__dirname + '/../../../../../../../modules/custom/test_folder/assets/image.jpg');
console.log(path);
console.log('** test: ', fs.existsSync(path))

The upload commands I am testing

.uploadFile('.form-managed-file__main input[type="file"]', require('path').resolve(path))
// .setValue('.form-managed-file__main input[type="file"]', require('path').resolve(path))

Both of these return similar errors

Error   Error while running .uploadFile() protocol action: invalid argument: File not found : unknown command: session/7c893475ca097b82470f980a18c87ab8/se/file

(Session info: headless chrome=106.0.5249.103)
(Driver info: chromedriver=106.0.5249.61 (511755355844955cd3e264779baf0dd38212a4d0-refs/branch-heads/5249@{#569}),platform=Linux 6.5.0-27-generic x86_64)

TimeoutError
An error occurred while running .uploadFile() command on <.form-managed-file__main input[type="file"]>: invalid argument: File not found : unknown command: session/7c893475ca097b82470f980a18c87ab8/se/file
(Session info: headless chrome=106.0.5249.103)
(Driver info: chromedriver=106.0.5249.61 (511755355844955cd3e264779baf0dd38212a4d0-refs/branch-heads/5249@{#569}),platform=Linux 6.5.0-27-generic x86_64)

Is there anything special I need to do to get to work in Docker? Or maybe just some steps to debug, as existsSync says the file is there (returns true), but nightwatch says it isn't. I have gone through forum posts, but most comments are quite old, and also don't appear to help resolve this.

Thanks for any tips,
Dan