# X_PWA_STRATEGY_EXHAUSTED

## Means

a caching strategy had no cache, no network and no fallback

## Typical cause

`staleWhileRevalidate` with no `StrategyOptions.fallback` and the network failed

## Fix

pass `fallback` to the strategy, or set `pwa.offline.fallback`

[PWA and build skew](/error-codes#pwa-and-build-skew)