[Koha] After writeoff fine check out is not working

Hi everybody, My library recently migrated to Koha 3.00.06 from 3.00.05. Everything looks good in opac and staff client and we have already solved place hold problem. Present problem is that check out is not working after writeoff fine. When I try to check out, it displays yellow bar above the check out box. Any thoughts about this regard. Please help me to solve this problem. Best regard Nur Ahammad (Junior Assistant Librarian) BRAC UNIVERSITY LIBRARY