Root Agent not found when launching adk web due to buggy agent or sub-agent code

When starting off with ADK development with the Quickstart or with the sub-agent templates, if the underlying code is buggy, then adk web will show a root agent not found error even though the bugs are caused due to buggy code underneath.

A work around could be to use more succinct debugging messages or having a code execution tab in the ADK web interface.