Hi there!
Did you try changing plugin positions on the plugin manager to see if them will work?
My plugin just get the `BattleManager._rewards.items` from the default code of the RPG Maker and use it to show on the Battle Results screen. If the other plugin also uses that to add rewards, then they should work fine. But I can see on the plugin page that the author may have go for a different and unique way:
So, the only way for me to make a compatibility patch, is by taking a look at the plugin code. Add me on discord: hakuenstudio
Upload a project somewhere with both plugins already configured, and send me a link to that project so I can test and see if a compatibility can be made.