PyCharm debug console with SSH

When I try to use the console in debug mode on PyCharm with a remote SSH interpreter I get an error:

>>>x=1
Traceback (most recent call last):
File "/ATS/RobHome/.pycharm_helpers/pydev/_pydevd_bundle/pydevd_comm.py", line 1418, in do_it
result = pydevconsole.console_exec(self.thread_id, self.frame_id, self.expression, dbg)
File "/ATS/RobHome/.pycharm_helpers/pydev/pydevconsole.py", line 483, in console_exec
need_more = exec_code(CodeFragment(expression), updated_globals, frame.f_locals, dbg)
File "/ATS/RobHome/.pycharm_helpers/pydev/pydevconsole.py", line 400, in exec_code
interpreterInterface.interpreter.update(globals, locals)
File "/ATS/RobHome/.pycharm_helpers/pydev/_pydev_bundle/pydev_ipython_console_011.py", line 346, in update
self.ipython.history_manager.save_thread.pydev_do_not_trace = True #don't trace ipython history saving thread
AttributeError: 'NoneType' object has no attribute 'pydev_do_not_trace'

This error message comes up whether I reference an active variable at the debug point, or if I do something simple like ">>>x = 1"

I do not get this issue if I debug using a local interpreter running the same version of Python.

I was wondering if there are settings in the debugger that have to be modified in order to allow the debug console to be used. In the Debugger settings under "Built-in server" settings I enabled "Can accept external connections" and "Allow unsigned requests", but still no luck.

Any thoughts, is this something that anyone else has seen? Any advice or insight much appreciated, thanks.