When using drush to enable this module in D7, I get this response, but says it's successful:
$ drush pm-enable token
The following projects will be enabled: token
Do you really want to continue? (y/n): y
WD theme: Theme key "token_tree" not found. [warning]
token was enabled successfully. [ok]
I'm not exactly sure what this means or if this is helpful for debugging and would appreciate feedback.