URL Error when add Langfuse

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To resolve the validation error "1 validation error for LangfuseConfig host Value error, host must start with https:// or http://", ensure that the host value starts with "https://" or "http://".

In your case, the host is set to "https://us.cloud.langfuse.com", which is correctly formatted. Double-check for any leading or trailing spaces in the host field that might be causing the issue. If the problem persists, verify that the LangfuseConfig class and its validation logic are correctly implemented in your codebase.

Here is the relevant part of the code for reference:

class LangfuseConfig(BaseTracingConfig):
    public_key: str
    secret_key: str
    host: str = 'https://api.langfuse.com'

    @field_validator("host")
    def set_value(cls, v, info: ValidationInfo):
        if v is None or v == "":
            v = 'https://api.langfuse.com'
        if not v.startswith('https://') and not v.startswith('http://'):
            raise ValueError('host must start with https:// or http://')

        return v

Ensure that the host value is correctly formatted when you instantiate LangfuseConfig:

config = LangfuseConfig(
    public_key="your_public_key",
    secret_key="your_secret_key",
    host="https://us.cloud.langfuse.com"
)

If the issue persists, review the configuration modal in the Dify platform to ensure the host field is correctly set:

<Field
    label='Host'
    labelClassName='!text-sm'
    isRequired
    value={(config as LangFuseConfig).host}
    onChange={handleConfigChange('host')}
    placeholder='https://cloud.langfuse.com'
/>

Make sure there are no hidden characters or formatting issues in the host input field ^[1][2][3].

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