Closes #2763

ArchiSteamFarm/Steam/Integration/ArchiWebHandler.cs

@@ -195,6 +195,7 @@ public sealed class ArchiWebHandler : IDisposable {
 						// ReSharper disable once RedundantSuppressNullableWarningExpression - required for .NET Framework
 						switch (response.Content!.ErrorCode) {
 							case EResult.DuplicateRequest:
+							case EResult.ServiceUnavailable:
 								response = null;
 
 								continue;

ArchiSteamFarm/Steam/Integration/SteamUtilities.cs

@@ -34,6 +34,10 @@ internal static class SteamUtilities {
 			throw new ArgumentNullException(nameof(errorText));
 		}
 
+		if (errorText.StartsWith("EYldRefreshAppIfNecessary", StringComparison.Ordinal)) {
+			return EResult.ServiceUnavailable;
+		}
+
 		int startIndex = errorText.LastIndexOf('(');
 
 		if (startIndex < 0) {