When installing an SSL certificate, if you get a “Modulus mismatch”, that means that the KEY file does not match the key used to generate the SSL certificate. Double-check that
Tag: CSR
Go to the /etc/ssl/certs/ or /usr/share/ssl/certs/ directory and run: openssl genrsa -des3 -out ../private/DOMAIN.key 2048 openssl req -new -key ../private/DOMAIN.key -out DOMAIN.csr