I recently upgraded my site from 1.8 to 1.9.9, i upgraded the site first and then the plugin (i deleted the certificate files from the mod folder and installed the new ones and ran notifications link)
1. My notifications link goes blank - It says to increase upload size limit, which is done but still shows the error.
2. I can see certificate plugin installed in 'Manage activities' (i can see 19 activities here ) but cannot see my old certificates inthe courses.
3. I can add a new certificates but cannot see old issued certificates.