With an employment contract, the parties have an obligation to carry out the obligations set out under the contract in good faith. The employer's failure to communicate what you may have done wrong would normally involve a breach of their duty of good faith if not a breach of the express terms of the contract.
Because of this, I would look for a local employment law attorney to communicate a demand to the employer to restore your employment status consistent with the contract, or turn over evidence indicating why they have taken the actions they have so it can be determined whether they have a reasonable basis to terminate the agreement or are in breach, which could give rise to a lawsuit for damages.
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