Lowercase switch is correct.
Had the same issue.
Eventually went away, with me reinstalling/re-running the exploit, reformating the (32GB) card from a windows machine (fat32), and populating the files from a windows machine. Was on macOS before.
As said before, this scene has a documentation issue the size of a barn door. We dont know what "Install" does, we dont know what "Run does", we dont know at which point the folder is looked at, we have strange intermittent issues that are brushed away as user error (when they arent), and we have devs that dont dare to establish a communication channel thats not a random gaming chat service.
Enjoy.
Also, please provide details on what OS you are on, and what you did to solve it, if you eventually do.