My Joomla 2.5 website admin page loads a blank page
I have a joomla website and even though I had logged in to the backend successfully earlier today, I am now having issues logging in because when I try accessing the administration page that is mysiteurl.com/administrator, nothing happens and it just remains a blank page. The website is fine and I can browse through it with no issues but I now can't access the joomla admin page to give me access to my backend!! Please help and tell me what could be wrong and how I can rectify this..Thanks in advance...
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