The MoveAbort error you are facing typically occurs if the type passed to the create_currency function doesn't match expectations. From what you've described, it looks like you're passing an incorrectly formed one-time witness (OTW) to the function. The one-time witness should be named after the module in all uppercase letters. Make sure your OTW follows this convention, and you should be able to resolve the error. For more details, you can check this definition: move-book.com/programmability/one-time-witness.html#definition.