Unable to use ESM6B through Forge - ESMProteinError

[Ty9Sandra]

Dear ESMC Developer,

When I running the following snippet from the README to use ESMC 6B:

from esm.sdk.forge import ESM3ForgeInferenceClient
from esm.sdk.api import ESMProtein, LogitsConfig

# Apply for forge access and get an access token
forge_client = ESM3ForgeInferenceClient(model="esmc-6b-2024-12", url="https://forge.evolutionaryscale.ai", token="<your forge token>")
protein = ESMProtein(sequence="AAAAA")
try:
    protein_tensor = forge_client.encode(protein)
    print("Type of protein_tensor:", type(protein_tensor))
    if not isinstance(protein_tensor, ESMProteinTensor):
        raise TypeError("The encode method did not return an ESMProteinTensor instance. Type received: {}".format(type(protein_tensor)))
    logits_output = forge_client.logits(
        protein_tensor, LogitsConfig(sequence=True, return_embeddings=True)
    )
    print(logits_output.logits, logits_output.embeddings)
except Exception as e:
    print(f"An error occurred: {e}")

An error occurred: The encode method did not return an ESMProteinTensor instance. Type received: <class 'esm.sdk.api.ESMProteinError'>

It seems that there is something wrong with the code : protein_tensor = forge_client.encode(protein) , but I don't know why.

Thanks for your help.