Accepted and Removed from the Project

Hi, I'm new here. Last night I received a Gmail asking me to take a project test. In the email, I had to acknowledge that I'm not the best at this, but I do have some knowledge from my field of specialization (Data Science). Even so, I took a chance and decided to do it—I had nothing to lose. It took me about 3–4 hours, and then I submitted it. It’s worth noting that they didn’t ask us to use Hubstaff; they were clear about that on Discord. This afternoon, I received a Gmail saying that I had tasks for that same project and to start working on them (meaning I’d been accepted), but then two hours later, I got another Gmail saying I’d been removed from the project. My question is, did I do something wrong? Did I make a mistake, or did they simply decide to remove me after accepting me? If anyone could help me, I’d appreciate it.