Exception during login:
SimpleSAML_Error_Exception: Unable to load private key from file "/opt/simplesamlphp/cert/saml.pem"
Backtrace:
10 /opt/simplesamlphp/lib/SimpleSAML/Utils/Crypto.php:157 (SimpleSAML\Utils\Crypto::loadPrivateKey)
9 /opt/simplesamlphp/modules/saml/lib/Message.php:27 (sspmod_saml_Message::addSign)
8 /opt/simplesamlphp/modules/saml/lib/Message.php:99 (sspmod_saml_Message::addRedirectSign)
7 /opt/simplesamlphp/modules/saml/lib/Message.php:442 (sspmod_saml_Message::buildAuthnRequest)
6 /opt/simplesamlphp/modules/saml/lib/Auth/Source/SP.php:187 (sspmod_saml_Auth_Source_SP::startSSO2)
5 /opt/simplesamlphp/modules/saml/lib/Auth/Source/SP.php:316 (sspmod_saml_Auth_Source_SP::startSSO)
4 /opt/simplesamlphp/modules/saml/lib/Auth/Source/SP.php:390 (sspmod_saml_Auth_Source_SP::authenticate)
3 /opt/simplesamlphp/lib/SimpleSAML/Auth/Source.php:193 (SimpleSAML_Auth_Source::initLogin)
2 /opt/simplesamlphp/lib/SimpleSAML/Auth/Simple.php:141 (SimpleSAML_Auth_Simple::login)
1 /opt/simplesamlphp/modules/core/www/authenticate.php:45 (require)
0 /opt/simplesamlphp/www/module.php:127 (N/A)