Not able to train the ML model while clicking on start training button

hosted label_studio repository in my local linux system and i have started the label-studio-ml-backend in the docker for training ML model for tesseract . I am able to add model but after model adding when i am clicking on start training button nothing is happening it is not even calling fit api that is for model training and in the backend getting 404 error like below


please provide the solution for this issue so we able to train the model.