Description of problem: The ManaPlus package seems to be really old. The last available build (in latest Fedora) is manaplus-1.3.10.27.2-8.fc23 (from 2015), every later build failed, as can be seen here: https://apps.fedoraproject.org/packages/manaplus/
The ManaPlus package seems to be missing in Fedora 31. If the package was deprecated, feel free to close this bz.
ManaPlus seems to be no longer available in Fedora. Closing this bz.