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Messaging + change cover photo and other stuff not working
I think your server is not fix with Jomsocial needs, I havent inspected this is into deepth, but this is my suggestion :
1. fresh install joomla and jomsocial again
2. if still not working try it on your localhost
3. if in your local works and in your live server not, please you choose another hosting provider.
I suggest you contact the cloudaccess developer, I think there is someting wrong with the server configuration, because every ajax action is leading to "303 See other"
usually this issue caused by apache setting or htaccess setting, originally not jomsocial issue