After clicking CONTEXTS, when I select a context, click on the X for removing it, and I confirm the dialog box, the context is not deleted, and what's more, a message like the following is retrieve in a red box:

Oops...Your slow network access has caused a connection timeout or network error, please check your network and retry or refresh the page.

The rest of the app is working pretty well, with almost no delays, so I assume it cannot be due to slow network access...

Furthermore, if I unfold all the contexts in the left bar menu, and then click on the little gear icon and select delete there, it doesn't work either.

Hope the description is clear enough!

PS: Sometimes it may take a while to display the red textbox. You can even try to delete the context several times, and after half a minute you get a log of red textboxes.