I am doing a migration to Multisite and want to use your plugin Domain Mapping. However I am not able to add it to my website. When I open this page:
with Admin user I am told that I am not authorized to access this website.
When I try to
manually install the Domain Mapping plugin on my test website
bonavi-online.de I am sent to:
which again shows the same error.
What can be the reason for this error? How can I install the plugin by uploading it's code - I need to add the plugin's code to our repository in any case.