Hi Alexandre,
Encountered the same issue today after upgrading Docker container. Downgraded to 1.4.0 got a better error message warning me for unsecured connection to MySQL. Wed Feb 22 20:50:49 CET 2023 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification. What I did next was to include the following option for Docker container creation after finding the option mysql-ssl-mode (https://guacamole.apache.org/doc/gug/jdbc-auth.html) for guacamole. -e MYSQL_SSL_MODE=disabled After this the connection is ok again and Guacamole works again. Kind Regards, Sander.
