Login unsuccessful exception on Appian-Locust

Hi,

I am new to Appian-Locust, I have installed Appian Locust, executed a login script for Appian URL and I am getting this exception "Login unsuccessful, no multipart cookie found, only found <RequestsCookieJar[<Cookie JSESSIONID....". I checked my credentials and they are working fine when login manually. I have tried executing the same Appian URL via generic Locust and there is no such exception shown.

Can anyone help here.

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