When Studio is installed, the last step of the installer asks you if you want to integrate Studio with the Luna publisher. If this step is skipped, the installer will not add the urls.
For some reason, the upgrade installer (only applies to upgrading the server) or the Studio installer may not have added these additional lines to the end of your InsightStudio.dat file during installation.
To fix this, open the InsightStudio.dat file located in the same folder as the Studio application and scroll to the bottom. If you don't see the following urls, add them.
# LUNA Publisher
LasLoginURL = http://<server address>:8180/las/login-from-studio.htm
LasScheduleURL = http://<server address>:8180/las/session-schedule.htm
LasThemeUploadURL = http://<server address>:8180/las/image-file-upload.htm
replace:
'<server address>' with your server address that is running the JBoss service
replace:
':8180' with your Jboss port number if you chose a different port other than 8180 for Jboss. You can find this out from your Insight admin.
Restart Studio.