I apologize for the delay. Changing the name of the splash screen upon startup can be done in the project settings under Description > About > Project Name.
As for the error, I looked it up and it seems like a common fix for it is to delete your Binaries and Intermediates folders, re-generate your project files, and then compile. It seems to be something to do with one of the old generated files that were based off the old name causing issues.