Can anyone help me understand the offboarding process and what triggers being offboarded from the Diamond Project even though your rating is a 3.0?

Hello, I was invited to work on the Diamond project on the Multimango platform. I have been working on the platform for about 2 months, I started off at a rating of 2 then went up to 3 around 2 weeks ago. I followed all guidelines triple checked my work made sure I had everything following the guidelines for each task. I even took my time with each task. I really enjoyed working the tasks that were assigned to me. However, I recieved an email today stating that I was being offboarded from the project without any reasons why, and I quote "

Being offboarded from the project means you will no longer be able to continue working on it. Please note that no additional explanation will be provided, and the decision is final with no review or appeal process.
Regardless of what your status may show in the client tool, this email serves as the final notice that your participation in the project has ended. The reasons displayed for the ‘unapproved’ status in the platform do not reflect the actual conditions of the offboarding. They should not be considered as the cause of the status, and access to the platform for this project will be permanently restricted."
I am not understanding why management is not giving critical critism for those that apparently have done something wrong and then not give any explanation as to why supplier is wrong or what they were doing wrong. That is something extremely important for the people working on these projects to learn and grow from the mistakes that are being submitted. I as a manager myself do not expect my team to automatically know what is being done wrong without some explanation of what is wrong and show how to correct the issue. 
If anyone can tell me anything about the issue and help me start working again. This was food money for my children and provided gas to get back and forth from my other job. It's really a shame that the management team thinks that this type of behaviour is of high quality when it isn't professional nor does it benefit the workers having to be denied this way. How do they correct their mistakes without being shown what they are doing wrong?
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