Issue Summary

Bamboo throws error 500 when adding AD or LDAP user directory.

Steps to Reproduce

1. Open Bamboo version 11.0.7
2. Go to ⚙️ > Overview > User Directories page
3. Click on Add Directory and choose LDAP 

Expected Results

The screen should open to configure the LDAP directory. 

Actual Results

We get the below error

Type Status Report

Message Handler dispatch failed; nested exception is java.lang.NoSuchMethodError: 'boolean com.atlassian.crowd.common.properties.BooleanSystemProperty.isDefined()'

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available