Try contacting Adobe support. You can start a chat session by clicking on the blue Contact Us button under the Support menu at Adobe.com. Or you can contact Support by telephone using the numbers listed here: https://helpx.adobe.com/contact/phone.html. With your permission, the tech support can take control of your computer and install the program, or at least tell you why you need a password. The error code that you mention generally indicates that the user has cancelled the installation. However, I know nothing about Macs so can't offer any better explanation. Note that Adobe support is only open during normal business hours in Europe.
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