Hi, i don't got answers but i resolve issue myself and it remind me somethings, so here every reason for bug i remenber:
- Cut and paste project in the project folder can bug superpower
- Check plugn you dowload and try instal/uninstall (MY SERVER-SETTINGS-System and plugin)
- NEVER name thing with accent: é,à, ect...
There is some other things but my memorie smell fish, red fish. So hope it help.