Issue
When trying to open Nintex Workflow Designer, Nintex Forms designer, or run a Nintex Workflow, the following error is presented in a dialog window or the workflow history:
The transaction log for database 'XXXXXX' is full due to 'LOG_BACKUP'
The transaction log for database 'XXXXXX' is full due to 'LOG_BACKUP'
Resolution
Please follow Microsoft's guidance at the following article:
Troubleshoot a Full Transaction Log (SQL Server Error 9002)
Troubleshoot full transaction log error 9002 - SQL Server
Troubleshoot a Full Transaction Log (SQL Server Error 9002)
Troubleshoot full transaction log error 9002 - SQL Server
Error Code
The transaction log for database 'XXXXXX' is full due to 'LOG_BACKUP'
Additional Information
This issue is in the context of database maintenance in SQL Server and is not unique to Nintex Forms or Workflows.
Related Links
The Transaction Log (SQL Server)
The Transaction Log (SQL Server) - SQL Server
The Transaction Log (SQL Server) - SQL Server