Apache2 failed after upgrade from 1.9 to 2.x

Hi

My apache2 has failed, can you tell me how to fix it. :confused:
Startpar: Service(s) returned Failure: Cman apache2
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Syntax error on line 13 of /etc/apache2/sites-enabled/pve-redirect.conf:
SSLCertificateFile: file '/etc/pve/local/pve-ssl.pem' does not exist or is empty
Action 'configtest' failed.
The Apache error log may have more information.
failed!
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Thanks