When create a connection using PluginRegistration, I was getting the error below.
'PluginAssembly' entity doesn't contain attribute with Name = 'packageid' and NameMapping = 'Platform'.
Can you offer a solution ? Thank you.enter image description here
Recently Plugin Registration Tool added new features and if the user used to connect has not a System Administrator role errors can happen. I don't know if it is related to your case but I will check the roles first.
Also XrmToolBox has a Plugin Registration Tool (you can find it inside the Tool Library) you can try with this version and see if you can connect or not.
