Is there a plan for support of this plugin on Redmine 4.0.x?

[tkitynski]

Currently, while running bundler to install the plugin on Redmine 4.0.1, there are some error message (Redmine 4.0.1 uses Bundler 2 and there seems to be some reference to bundler 1.3). I can run it again and provide log, if needed.

[joaopedrotaveira]

You might want to check https://github.com/joaopedrotaveira/redmine_mylyn_connector. About 4.0.1 compatibility, someone managed it. I will update my repository soon. Check joaopedrotaveira#6.