I can’t comment on whether this is a security certificate issue, but when doing a couple of installations od DHIS2 and I had this issue, turned out Tomcat hadn’t been allocated adequate memory
You can check that and ensure it is decent cause for some reason it starts with 128kb which is enough to do the installation and even login but you are kinda stuck from there.
I have increase my memory to ‘-Xmx17500m -Xms12000m’ . Can you kindly suggest how much memory one would consider enough? It is a clean instance without my DB
According to the documentation, you can allocate as little as 4GB running on an 8GB RAM minimum. This is on the environmental variables.
However, the memory issue I am pointing to is on apache itself. When you run the tomcat administrator window, you can check under the Java tab and ensure the memory allocated is adequate.