I did a TON of testing before making the new version live. On PHP 5.6 and PHP 7.1 as well as on many sites with different plugins.
@adisaputro25, I am not sure what the problem is but it must be a conflict. It should work even with the buttons disabled as I mention in the readme. Please disable any other plugins that modify TinyMCE as a test. If you can help me narrow the problem I will work on it but as I said, I have it working on everything I throw it at.
As for the Chrome keyboard shortcut conflict that @ivaseg found. I can confirm I see the same problem now. Of course I somehow missed that in my testing ??
After looking at lists of Keyboard Shortcuts for Chrome, Firefox, IE and Edge I have decided to change the shortcuts to Ctrl+Alt. I really like using shift since we are dealing with capitalization but there are simply too many conflicts.
Sorry for the need of a quick fix everyone, but at least I am trying. ??