Internet Explorer 11 needs to have the obsolete SSL or TSL 1.0 protocol de-selected (usually off by default). These are out of date security protocols.
Navvia protection requires browser support for any one of the following security protocols to allow access:
TLS 1.1 and 1.2 SSL Protocols
Triple DES 168
AES 128/128 and AES 256/256 Ciphers
SHA, SHA256, SHA384 AND SHA512 Hashes PKCS and ECDH Key Exchanges
To change the Internet Explorer security settings, go to Tools / Internet Settings / Advanced and turn off Use SSL 2.0; Use SSL 3.0; Use TLS 1.0 and turn on Use TLS 1.1; Use TLS 1.2