Unfortunately, this is not Pretendo related.
Project Rose is not associated with us and has no affiliation.
I will ping @support-helper but there is no guarantee they will be able to help.
It might be as simple as removing the bad plugin from the SD:/wiiu/environments/aroma/plugins/ folder from the SD card on a computer.
We recommend asking for help in the Nintendo Homebrew Discord server.
discord.gg/nintendohomebrew