I installed Rapidscada on Ubuntu 16.04.5 LTS and following the instructions of install.txt in the zip. But the issue is when I open URL http://IP/scada, browser will literally download the page.
Please kindly help. Thanks in advance.
This problem is related with the modules libapache2-mod-mono and mono-apache-server4
Try to repeat the step sudo apt-get install libapache2-mod-mono mono-apache-server4
and check if there are some errors during installation.