Root cause issue -backup solution

Hello everyone,
I am currently looking for some advice on backup solutions (https://www.lenovo.com/au/en/servers-storage/solutions/backup-disaster-recovery/) and I was hoping to get some help from the community. Specifically, I am experiencing some issues with my backup and I am not sure how to resolve them. I have read about some common backup challenges and solutions, but I am still struggling to identify the root cause of the issue. I have also tried troubleshooting on my own, but I have not been successful in resolving the issue. If anyone has any experience with backup solutions or any suggestions on how to get started with troubleshooting, I would greatly appreciate it. Thank you in advance for your help!