await Future.delayed(Duration.zero); // prevent setState() or markNeedsBuild() error with Getx

prevent setState or markNeedsBuild

This is because you are trying to update an observable value while the widget tree is getting built, this is probably caused because of the method

GetBuilder<CustomerServiceController>(
              init: CustomerServiceController(),
              initState: (state) async { // Here
                await Future.delayed(Duration.zero); // And here
                var service = Get.find<CustomerServiceController>();
                if (customerService != null) {
                  service.nameTextController.text = customerService.title;
                  service.descriptionTextController.text =
                      customerService.description;
                  service.priceTextController.text = customerService.price;
                  service.endTextController.text =
                      customerService.endDate ?? '';
                  service.serviceCategory = customerService.category!;
                  service.serviceType = customerService.service!;
                  service.serviceProvider = customerService.provider!;
                  service.isSubscription = customerService.isSubscription!;
                } else {
                  service.nameTextController.text = '';
                  service.descriptionTextController.text = '';
                  service.priceTextController.text = '';
                  service.endTextController.text = '';
                }
              },
              builder: (controller) {
                return Column();
                }