Welcome the Technical Support section. Help us in assisting you by providing us with a concise and descriptive elaboration of your issues. Be specific and if possible, provide us with a step-by-step instruction in replicating your problem.
Crop(resize and drag) is not working for previously uploaded images
You are still using the old Jomsocial old version, I suggest you upgrade it first to the latest version 3.1.1, you can do it from iJoomla installer if you done with it, please you re test your issue, and let me know how it goes then.
1. you can download the latest package in "my account" page
2. in that package you will get the ijoomla installer
3. install ijoomla installer and install Jomsocial via ijoomla installer