I have noticed that sometimes when installing MCreator, I 'm getting an error that one file is corrupted or something however this does not affect the work of MCreator just clicking ignore and installation goes as normal also I just have tested it now and all works fine Everything is recompling and it runs client without the errors
Also here is the name of the file that was displayed as corrupted during the installation: ucrtbase.lib
Also I haven't found any of this file in MCR directory
This is most likely an issue with your computer or your Java installation as MCreator does not use any files called like this.