Warning regarding limited resources

I am certain that the gpu I am using is fully available and has no other processes, however I am getting this error:
Warning: The following resource request cannot be scheduled right now: {‘GPU’: 0.1, ‘CPU’: 1.0}. This is likely due to all cluster resources being claimed by actors. Consider creating fewer actors or adding more nodes to this Ray cluster.

Note that I did set: @ray.remote(num_cpus=1, num_gpus=1) initially and I still got errors, so I reduced it to 0.1. How do I fix this error?
note that I kept num_gpus=1 here: ray.init(num_cpus=1, num_gpus=1)