When connecting to Mart, the browser reports:

Tomcat reports the following error:
INFO: Error parsing HTTP request header
Note: further occurrences of HTTP request parsing errors will be logged at DEBUG level.
java.lang.IllegalArgumentException: Invalid character found in method name. HTTP method names must be tokens
Symptoms:
This error appears when connecting to the Mart Administration console when HTTPS is not enabled.
Resolution
Otherwise, to enable SSL, please follow the steps described here.