error message "Server certificate verification failed" on continuum.

Dear all

The Subversion (commandline and Tortoise client) works fine from the same machine.
for example) svn co https://hostname/trunk.
svn list https://hostname/trunk.

But it works not svn only continuum as below.

Provider message: The svn command failed.
Command output:
-------------------------------------------------------------------------------
svn: OPTIONS of 'https://hostname/svn/blabla/trunk/': Server certificate verification failed: certificate issued for a different hostname, issuer is not trusted (https://hostname)
-------------------------------------------------------------------------------

I think it need to use certificate on continuum.
So, I found jira, aparch group of continuum , but I could't solve it.
Could you please tell me how to solve?
Thanks regards.