[NVFLARE]: 'MONAITrainer' object has no attribute 'eval_engine'

i have setup nvflare with 1 server and 2 clients

i am running a hello-monai job from NVFlare/examples on both the clients

below are the logs screenshots

server######

client 1#####

client 2######

i found out that this file monai_trainer.py ( NVFlare/monai_trainer.py at main · NVIDIA/NVFlare · GitHub line no 179 is not working,please check the issue