Hi, this isn't a custom widget but the dev here are probably the best people that can help.
I am using ArcGIS enterprise portal build in webappbuilder splash widget. It is a new install and when I attempt to add the splash widget, I get stuck at configuration loading with the error below. I know nls is the language translation but I am unsure what is causing this error. Can anyone please assist? It seem to be missing nls.transparency therefore when it is trying to do a string replace on a undefine attribute, it threw an error.