The Database files are not included in the single-pass backup

Hi,
bought Acronis Backup Advanced 11.5 for SQL, but i'm unable to backup my different databases.
I receive an error in all databases saying:
Information 22-09-14 ਸਵੇਰ 02:00:43 SQL Server database 'database_name' of instance 'NAME_OF_INSTANCE' has not been backed up because the database files are not included in the single-pass backup.
Can anybody help me to solve this?
Thank you

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Hi Sam,
first of all please check if all prerequisites are met according to this article:
https://kb.acronis.com/content/42648
If it doesn't help, please contact our support so that we could help you: http://www.acronis.com/support/contact-us.html
Thank you,
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Anna Trifonova
Acronis Customer Central | Acronis Backup Software
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