One or more unsupported elements were found in the schema used as part of a data package

Because of the error in the topic I cant create a simple full backup of our azure sql database.
Manually creating and downloading a .bacpac file works of course.
Is there a way to solve this issue ? A shortened version of the error log:

22.05.2018 10:39 Starting job "Backup Job - 1 " - “Full”. Computer “SERVERNAME”. App v.“11.6.3”
22.05.2018 10:39 The backup folder “C:\Windows\TEMP\SYSTEM\Pranas.NET\SQLBackupAndFTP\backup” has “20,771GB” free space. The temporary folder “C:\Windows\TEMP\SYSTEM\Pranas.NET\SQLBackupAndFTP\backup” has “20,771GB” free space
22.05.2018 10:39 Backing up “azuredbconnectionstring.somewhere.net” AzureSqlServer databases
22.05.2018 10:39 Getting maximum file size…
22.05.2018 10:39 The maximum file size: “”
22.05.2018 10:39 Backing up “dbname” database to .bacpac file
22.05.2018 10:42 Failed to backup “dbname” database with “Full” backup type: One or more unsupported elements were found in the schema used as part of a data package.
Error SQL71501: Error validating element [dbo].[companygroup_IssueStats]: View: [dbo].[companygroup_IssueStats] contains an unresolved reference to an object. Either the object does not exist or the reference is ambiguous because it could refer to any of the following objects: [dbo].[User].[IssueFieldValue], [companygroup].[Issue].[IssueFieldValue], [companygroup].[IssueCategory].[IssueFieldValue], [companygroup].[IssueFieldValue].[IssueFieldValue], [companygroup].[IssueFieldValue].[IssueId], [companygroup].[IssueRevision].[IssueFieldValue], [companygroup].[LocalizedContent].[IssueFieldValue], [companygroup].[TestItem].[IssueFieldValue], [companygroup].[TestItemInstance].[IssueFieldValue], [companygroup].[TestObject].[IssueFieldValue] or [companygroup].[TestObjectType].[IssueFieldValue].
Error SQL71501: Error validating element [dbo].[companygroup_IssueStats].[CheckInstanceId]: Computed Column: [dbo].[companygroup_IssueStats].[CheckInstanceId] contains an unresolved reference to an object. Either the object does not exist or the reference is ambiguous because it could refer to any of the following objects: [dbo].[User].[CheckInstance], [companygroup].[CustomFieldOption].[CheckInstance], [companygroup].[Issue].[CheckInstance], [companygroup].[IssueCategory].[CheckInstance], [companygroup].[IssueFieldValue].[CheckInstance], [companygroup].[IssueRevision].[CheckInstance], [companygroup].[LocalizedContent].[CheckInstance], [companygroup].[TestItem].[CheckInstance], [companygroup].[TestItemInstance].[CheckInstance], [companygroup].[TestItemInstance].[Id], [companygroup].[TestObject].[CheckInstance] or [companygroup].[TestObjectType].[CheckInstance].

Hi Harald,

Thanks for the details. Could you please tell us, are you able to perform a backup via SQL Server Management Studio? Do you get any error messages?