my site seems to have stopped working randomly.
when I add an idem to cart it goes to cart, when i go to check out via paypal it works fine
when i try to login as a customer it says "There was a security error when trying to login."
when i try to create a new account it goes to the page to enter detail i ender details then hit sign up and the page just refeshes and all empty, checking in admin new customer is not created.
can anyone point me in the right direction?
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