'.selectFile must only be invoked from the spec file or support file' error in Firefox

[RKNeedsHelp]

Current behavior

I use this code to upload a File which works perfectly in Chrome, Edge and Electron but not in Firefox:
cy.delayedGet('[type="file"]').selectFile('Test Word bestand.pdf', { force: true });

I have also tried this version which results in the same behavior:
cy.get('input[type=file]').selectFile('cypress/fixtures/Test Word bestand.pdf', { force: true, action: 'drag-drop' });

The errror:
cy.selectFile() must only be invoked from the spec file or support file.

Desired behavior

For the file to successfully upload also in Firefox

Test code to reproduce

    cy.get('input[type=file]').selectFile('cypress/fixtures/Test Word bestand.pdf', { force: true, action: 'drag-drop' });

    cy.delayedGet('[type="file"]').selectFile('Test Word bestand.pdf', { force: true });

Cypress Version

v13.2.0

Node version

v18.17.1

Operating System

Windows 22H2

Debug Logs

Other

Issue is similar to #27149 and #27457

[nagash77]

Hi @RKNeedsHelp
In order to give our engineers the best chance at recreating your problem, please create a reproducible example using a fork of Cypress Test Tiny. This gives us the best chance of seeing exactly what you are seeing and being able to investigate effectively.

[KrzysztofWisniewskiAcc]

This should not be closed as it exists on 13.3.2

node: 18.18.2
npm: 10.2.0
cypres: 13.3.2
system: win11

I have only cypress installed.
Runing e2e specs tests

describe('=== Some spec ===', function () {
    context('+++ Test file +++', function () {
        it('- Put file into input', {}, function () {
            cy.get('#file-input-xxx').selectFile('cypress/fixtures/files/test.csv');
        })
    })
})