Your package seafile-client failed to build from source in current F28. https://koji.fedoraproject.org/koji/taskinfo?taskID=24895743 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
This bug seems to arrive quite late. I update seafile-client to 6.1.6 this week and fixed the build issue with f28: https://koji.fedoraproject.org/koji/buildinfo?buildID=1057747