Xformers wasnt build with CUDA support

[snehasree-sony]

raise NotImplementedError(msg)

NotImplementedError: No operator found for memory_efficient_attention_forward with inputs:
query : shape=(1, 2, 1, 40) (torch.float32)
key : shape=(1, 2, 1, 40) (torch.float32)
value : shape=(1, 2, 1, 40) (torch.float32)
attn_bias : <class 'NoneType'>
p : 0.0
decoderF is not supported because:
xFormers wasn't build with CUDA support
attn_bias type is <class 'NoneType'>
operator wasn't built - see python -m xformers.info for more info
[email protected] is not supported because:
xFormers wasn't build with CUDA support
dtype=torch.float32 (supported: {torch.bfloat16, torch.float16})
operator wasn't built - see python -m xformers.info for more info
cutlassF is not supported because:
xFormers wasn't build with CUDA support
operator wasn't built - see python -m xformers.info for more info
smallkF is not supported because:
max(query.shape[-1] != value.shape[-1]) > 32
xFormers wasn't build with CUDA support
operator wasn't built - see python -m xformers.info for more info
unsupported embed per head: 40

How do i solve this error?? I tried installing triton and Xformers