55876: [Fixed] Acronis Backup Cloud: Backup Client Installation Fails with "An unexpected error has occured. HTTP responce code: 400"

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Applies to: 


  1. You start installation of Acronis Backup Client.
  2. Installation fails with:
    Code: 06553603
    Line tag: 0xe71b9a1528b1baa8
    Message: An unexpected error has occured. HTTP response code: 400.


You have provided administrator account credentials instead of Backup Account credentials.


The issue has been fixed. Since version 4.2 (Agent build 12.0.1588) an Agent can be installed with administrator's credentials.


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