RMD160 not found

[0xd5dc]

Fri Aug 23 11:01:37 2019 MANAGEMENT: CMD 'username "Auth" "test"'
Fri Aug 23 11:01:37 2019 MANAGEMENT: CMD 'password [...]'
Fri Aug 23 11:01:37 2019 WARNING: No server certificate verification method has been enabled. See http://openvpn.net/howto.html#mitm for more info.
Fri Aug 23 11:01:37 2019 MANAGEMENT: Client disconnected
Fri Aug 23 11:01:37 2019 Message hash algorithm 'RMD160' not found
Fri Aug 23 11:01:37 2019 Exiting due to fatal error

Everything else works, but OpenVPN couldn't connect due to RMD160 not found. Can you provide a fix?

[0xd5dc]

apk upgrade --update-cache --available && \ apk add openssl && \ rm -rf /var/cache/apk/*

I tried to install openssl to solve the issue but the problem stays the same