症状

Users are unable to create a new space. The following appears in the atlassian-confluence.log:

java.lang.IllegalArgumentException: Invalid space key.
at com.atlassian.confluence.spaces.DefaultSpaceManager.createSpace(DefaultSpaceManager.java:428)

原因

The space key contains illegal characters, or the space key already exists.

ソリューション

Chose a different space key, which can only consist of ASCII letters or numbers (A-Z, a-z, 0-9).