In the middle of Task Server not working

I have give a task to be completed. But suddenly the sever stopped responding.
As as result I can’t submit the task finish button or retry later button. Its showing that I have failed.

What to do with this issue.

In the following link this the part of my solution before sever stopped working.

https://www.kodekloud-engineer.com/#!/task_review?task_id=6058062d9d582fb5af53320f