I am getting an incessant error 404 message: I don't understand what the issue is or how to correct it

THe message reads:
The URL https://calendar.google.com/calendar/dav/[email protected]/user///calendar.google.com/calendar/dav/[email protected]/user/ encountered HTTP error 404. Make sure the URL is correct.
It's really annoying; I can disable the account altogether I think, but I'd rather have a gmail linked calendar. I just have no idea how to fix this error.

Running the Lion Os requires a MINIMUM of 2 GB of RAM, as you have. However, with that little RAM the computer will have trouble with many memory based tasks, such as copying and pasting. You really need to increase the amount of RAM your computer has in order to increase its speed and performance. Now, when a task requires more RAM than your system has available then the OS will use some harddrive space temporarily instead. This is called "Virtual Memory." Is it possible that at this time that your harddrive is very full relative to its stated capacity, so that even "virtual memory" is not really available? If that is the case, you really need to cleanup your harddrive by deleting a fair number of less used files.
Hope this helps

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