Assignments list not appearing

After installation of standalone server, assignments appears to interviewers when they synchronize but the assignments not appearing in my survey management panel, it displays “No data available in the table”

The issue has been sorted out!

Glad that you’ve managed to solve this problem. Are there any details that you wish to share with other users?

I restored the backed up database in PostgreSQL, after resuming/restarting the server the list of assignments to interviewers could not display (“no data available in the table”). But, when i created new assignment from another questionnaire the newly created assignments could display. so far i don’t know why could not display, perhaps might be the issue of doing backup and restoring the database while the survey is in progress. Since the assignments could appeared when i created from a another another questionnaire my problem was solved.