You are currently reviewing an older revision of this page.
All users are unable to login to Appian with the message:
'Error401 - Unauthorized: Sorry, your request could not be processed'
Tomcat logs the following in <APPIAN_HOME>/logs/tomcat-stdOut.log:
<APPIAN_HOME>/logs/tomcat-stdOut.log
Error parsing HTTP request headerjava.lang.IllegalArgumentException: Invalid character found in method name. HTTP method names must be tokens
The scheme is incorrectly configured in custom.properties.
Ensure custom.properties is configured according to installation documentation so that the line conf.suite.SCHEME=http is uncommented.
conf.suite.SCHEME=http
Restart Tomcat.
This article applies to Appian 18.3 and later.
Last Reviewed: January 2018