ConstThrown by configure when Configuration#baseURI is neither falsy nor a string. A URL object used to be
accepted here, because new URL(uri, baseURI) stringifies its base, and then failed much later with a DataCloneError
the first time a web worker ran, since the base URL is posted to it. Unlike Configuration#workerURI and
Configuration#wasmURI, it cannot be a function: it is resolved before any URI is.
Invalid baseURI error