fix currency service error

app/Listeners/UpdateCurrencyRates.php

 
 use App\Contracts\CurrencyHandler;
 use App\Events\DefaultCurrencyChanged;
+use App\Facades\Forex;
 use App\Models\Setting\Currency;
 use Illuminate\Support\Facades\DB;
 
                 $defaultCurrency->update(['rate' => 1]);
             }
 
-            $this->updateOtherCurrencyRates($defaultCurrency);
+            if (Forex::isEnabled()) {
+                $this->updateOtherCurrencyRates($defaultCurrency);
+            }
         });
     }