https://xoops.org/modules/newbb/
VS.
https://xoops.org/modules/newbb
In the first case one receives a blank plage and in the second the forums are loaded.
I suppose the same goes for every XOOPS2 site depending on whether XOOPS Virtual Path is set with "www" or without.
For example if your XOOPS Virtual Path ishttp://myXoopsSite.com
then when directly typing into a browserhttp://www.myXoopsSite.com/modules/somemodule/ will result into a blank page...