The problem results from the higher markdown version (Found existing installation: Markdown 2.6.2), which is reported here. Install the lower version to solve it: sudo pip install Markdown==2.4.1 ...
do you have acces to the server where your site is hosted? if so you just need to enter in django shell: python manage.py shell then run the following code: from forum import settings settings.MAINTAINANCE_MODE.set_value(None) exit() With that the maintainance mode will be disable and you will be able to...