In Node Permissions when I click on a node, choose a user group, change one of the options e.g. from 'inherit' to 'yes' then click save, it seems to save as the orange loading symbol is shown but then nothing happens.
If I then go back and then check the change made, the change is not saved. See screen capture below (apologies for the sound)...
If I then go back and then check the change made, the change is not saved. See screen capture below (apologies for the sound)...