Surface image loading error in Reader (#1981)

source-api/src/commonMain/kotlin/eu/kanade/tachiyomi/source/model/Page.kt

@@ -53,6 +53,6 @@ open class Page(
         data object LoadPage : State
         data object DownloadImage : State
         data object Ready : State
-        data object Error : State
+        data class Error(val error: Throwable) : State
     }
 }