Loris Server error

Hi, 

We are testing IIIF with https://digitaltoolsmss.library.utoronto.ca/iiif-to-go/

Loris server is giving this error and not working on: http://127.0.0.1:8181/loris/omeka-main/

Not Found
The requested URL was not found on this server.
Apache/2.4.41 (Ubuntu) Server at 127.0.0.1 Port 8181