I have installed the Markdown Support plugin Version: 182.4129.4 in pycharm community edition version 2018.2.4-1 on Manjaro Linux running 4.19.1-1-MANJARO kernel.
I am able to edit the .md file but I am unable get the preview of it. On checking the Markdown option in the Languages & Frameworks tab in the Settings, it shows 'There are no available preview providers'.
I have been able to reproduce this bug on the previous two versions of pycharm and the plugin too. I have no problem in the Windows 10 counterpart. The plugin works fine in Windows 10 even in previous version of pycharm and the plugin.