Install success but can not used

[riboseyim]

Environment:
Redmine version 2.3.1.stable
Ruby version 1.9.3 (x86_64-linux)
Rails version 3.2.13
Environment production
Database adapter Mysql2
Redmine plugins:
redmine_importer 1.0

I can see this in plugins manage Page
Issue Importer
Issue import plugin for Redmine.
Martin Liu / Leo Hourvitz 1.0

If I enabled this module in any project ,I will can't use this project

[technoob91]

Same problem here if i enable this module and try opening the project it gives error "Page doesn't exist"

Environment

Environment:
Redmine version 2.2.4.stable.13438
Ruby version 1.8.7 (x86_64-linux)
Rails version 3.2.12
Environment production
Database adapter Mysql
Redmine plugins:
redmine_importer 1.0

Please give me a solution.

[salehi]

Yeah, I have the same issue, but 404 error instead of 500 error.
How to fix it?