X_LOCAL_STORE_UNAVAILABLE
Means
the page's durable store could not open
Typical cause
IndexedDB is blocked or absent (a private window, storage disabled, a runtime with no indexedDB), so persisted records and queued writes live in memory and are lost on reload. A warning, never thrown: console.warn once, and the page carries on, because a page never breaks for being unable to remember. 21.0.0
Fix
nothing to do in the app. Allow site storage in the browser (a private window blocks it) and reload