SCPlugin MAC system is not under Checkout how to solve? Server sent unexpected return value (403 Forbidden

Checkout time error, tips:
Server sent unexpected return value (403 Forbidden) in response to OPTIONS request for 'http://192.168.15.89/svn/gcl'
Account number and password is correct, the user name will not be on my other svn cause? My other svn svn user name and this is not the same, that svn can successfully Checkout.

Reply:
The certificate is not the reason ah, first try using svn command line, and then accept the certificate.
Reply:
In the terminal --- the permission to open ~ ~
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cited a floor reply:

certificate is not the reason, ah, first try using svn command line, and then accept the certificate.

Thank you! I can use the command line, but today mistype a command, svn update will no longer take less than a direct Tip:
dell $ svn update
svn: access to 'http://192.168.15.89/svn/gcl' forbidden
How to delete the certificate ah?