Me to atoo, I got this error message when I checked the httpd syntax :
SSLCertificateFile: file 'C:/wamp64/bin/apache/apache2.4.46/conf/key/certificate.crt\xe2\x80\x9c' does not exist or is empty
My problem was the "double Quote" I had pasted. So I deleted it and typed it, then it worked fine.