renewing letsencrypt

Hi, I had troubles renewing letsencrypt certificate from virtualmin, so I tried from command line - went fine, new cert files are in /etc/letsencrypt/archive/red/
I tried to copy them to webmin:

cd /etc/webmin/
cp /etc/letsencrypt/archive/red/cert2.pem red.cert
cp /etc/letsencrypt/archive/red/chain2.pem red.chain
cp /etc/letsencrypt/archive/red/privkey2.pem red.key
and cat /etc/letsencrypt/archive/red/privkey2.pem /etc/letsencrypt/archive/red/cert2.pem >> miniserv.pem

after restarting webmin I see in chrome:
Unsupported protocol
The client and server don’t support a common SSL protocol version or cipher suite.

Am I doing anything wrong?

still curious why it didn’t work…
But I solved it another way - deleted existing certificates, disabled website ssl + removed certs + reenabled it. Then requested new cert from virtualmin panel - succeded. Use option to copy to usermin/webmin/dovecot - all works.