fix undeclared ok error.

lnbits/core/services.py

@@ -107,8 +107,7 @@ def pay_invoice(
         if ok:
             create_payment(checking_id=checking_id, fee=fee_msat, **payment_kwargs)
             delete_payment(temp_id)
-
-    if not ok:
+        else:
             raise Exception(error_message or "Unexpected backend error.")
 
     return invoice.payment_hash

lnbits/core/views/api.py

@@ -74,6 +74,7 @@ def api_payments_pay_invoice():
     except PermissionError as e:
         return jsonify({"message": str(e)}), HTTPStatus.FORBIDDEN
     except Exception as e:
+        print(e)
         return jsonify({"message": str(e)}), HTTPStatus.INTERNAL_SERVER_ERROR
 
     return (