The debugger also shows the 404 and shows a warning: RNCNetInfo - You are using the deprecated API. …you must upgrade to the new API … is this the problem and how do I fix.
The Airtable URL looks fine. It gives this error if you use wrong record ID (from a different table e.g.) or if the base ID is wrong ( the appxsw34). Wrong table gives explicit error mentioning wrong table.