I've used the tool many times in the past without any problems but since September I can't get it to work. I've tried media creation tool versions 1903 and 1909. I'm even holding on to old Windows 10 v. 1809 USB sticks because of this.
It all goes smoothly until the last progress meter hits 50%. I've read that this could be due to a faulty USB drive but I've tested more than a dozen that appear to function with other uses.
Saving the image to ISO also works without any problems.
EDIT: Apparently the problem is with my computer. The same version of the media creation tool and the same usb drive worked fine in another computer. Does anyone know where the log files for the creation tool are stored?