How to use tensorboard correctlly? I have tried many times and have been reporting such errors. I can train normally without using tensorboard.

File "tools/run_net.py", line 46, in
main()
File "tools/run_net.py", line 27, in main
launch_job(cfg=cfg, init_method=args.init_method, func=train)
File "/home/weijie/slowfast/slowfast/utils/misc.py", line 311, in launch_job
func(cfg=cfg)
File "/home/weijie/slowfast/tools/train_net.py", line 492, in train
train_epoch(
File "/home/weijie/slowfast/tools/train_net.py", line 181, in train_epoch
writer.add_scalars(
File "/home/weijie/slowfast/slowfast/visualization/tensorboard_vis.py", line 99, in add_scalars
self.writer.add_scalar(key, item, global_step)
File "/home/weijie/Acond/anaconda3/envs/slowfast/lib/python3.8/site-packages/torch/utils/tensorboard/writer.py", line 353, in add_scalar
summary = scalar(
File "/home/weijie/Acond/anaconda3/envs/slowfast/lib/python3.8/site-packages/torch/utils/tensorboard/summary.py", line 249, in scalar
scalar = make_np(scalar)
File "/home/weijie/Acond/anaconda3/envs/slowfast/lib/python3.8/site-packages/torch/utils/tensorboard/_convert_np.py", line 24, in make_np
raise NotImplementedError(
NotImplementedError: Got , but numpy array, torch tensor, or caffe2 blob name are expected.