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LastPass logs off almost immediately after I login?
If LastPass is logging off soon after you login, or your session seems to expire too quickly, this may be a caching issue with the browser. Try clearing your browser's cache (usually located in the "History" or "Tools" menu) and then login to LastPass again.
If problems persist, please report them to the team directly: https://lastpass.com/supportticket.php and confirm the steps you have already tried.