[keycloak-user] Cryptic error VFS000002: Failed to clean existing content for temp file provider of type temp while starting docker image

Hello, When I'm trying to start keycloak 4.5.0 docker image, I'm getting cryptic error message: [org.jboss.vfs] (MSC service thread 1-1) VFS000002: Failed to clean existing content for temp file provider of type temp. Enable DEBUG level log to find what caused this I've tried setting the environment variable KEYCLOAK_LOGLEVEL to DEBUG, as described in https://hub.docker.com/r/jboss/keycloak/ , but it didn't change anything. I still get that cryptic error log and nothing more. I can't log into docker image to check log files, because it got killed afterwards, so it makes finding the problem hardly possible. Has the name of the ENV variable changed, or it's generally not possible to change log level using official docker image? Best regards, Lukasz Lech