Well, I THINK

I have it working. I did a complete reinstall and it appears to have solved the login problem. Everything looks good so far except.
In admin when I go to edit categories, I get this error. All other admin functions seem to work so far.
Thoughts?
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Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
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