Assessment tests can be stressful enough even without technical issues 😥 But most things can be solved!

When it comes to assessment tests of various kinds that the employer sends out, it's also the employer who can help you if you experience any kind of problem, for example, with an invitation to a test. They can either help you access the test or send out a new one!

If you have problems with the test itself, it may be that you need to contact the test provider's own customer support. Depending on the provider, you can usually find contact information by Googling their name.

If you're unsure about anything, contact the employer first!