Hello Zakaria,
Try to access your site with the default template (using ?template=system or ?template=atomic as a suffx to your URLs). If you can see your site the there is an issue with your template.
I have never used a Joomlashine template but it has come to my knowledge that there is a possible conflict with some plugins and you might need to reorder your system or K2 plugins.
I am sure the Joomlashine developers will know exactly how to assist you.
PS. Always backup before doing anything
JoomlaWorks Support Team
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