I am constantly getting this error when working with eclispe and the subclipse plugin:
Unable to load default SVN Client
I have already install
Eclipse Java EE IDE for Web Developers.
Version: Oxygen.3a Release (4.7.3a) Build id: 20180405-1200
I solved this problem as follows
1) Install Subversive - SVN Team Provider 4.0.5 from marketplace
2) Team -> SVN -> SVN Connectors and set SVNKit 1.8.14
3) Restart eclipse
All works well