Couldn't submit job with non-gpu partitions

The launch button does not work when choosing non-GPU portions.

Check the debug console in web browser, we found the following message:

An invalid form control with name='batch_connect_session_context[bc_num_gpus]' is not focusable.
<input value=​"1" min=​"1" max=​"-1" step=​"1" class=​"form-control" type=​"number" name=​"batch_connect_session_context[bc_num_gpus]​" id=​"batch_connect_session_context_bc_num_gpus">