I am setting up a new Jenkins (2.130) and when uploading the sonargraph-integration plugin the upload and install is a success BUT then after you can not go into;
Manage Jenkins -> Global Tool Configuration
(you get error after some timeout with error stating that the folder is not possible to exist)

-After uninstall of that plugin it works again...
-No problems when installing other plugins...like ex: blue oscean, sonar, ldap and so on..

-I have tried the latest version of the plugin and also earlier ex : 2.1.0 but same problems...
(so I will try and see how far back the problem is. will check with sonargraph-plugin for version 7.

-But seems to be a bug since other plugins work..