WIndows Server Encrypted by Akira Ransomware | Need Help with Akira Decryption

Hello, I am sorry to post this here. I am trying to post on public forums for help. I am doctor by profession and recently my server got infected by a virus known as Akira ransomware. All files are ending with .akira extension. I am unable to access anything and seemed to be corrupted. The data is really important for me as it contains important research papers and my patient's history.
Note: I have already tested public decryptors like Avast Akira Decryptor. It did not work

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