Transmitting the message to endpoint using connection IDoc_AAE_....Auth fail

Hello Experts,

I am getting the below error

Transmitting the message to endpoint <local> using connection IDoc_AAE_....Auth fail

What is the root cause of this error?

I checked for this error but whatever I got was about the receiver without any Auth fail part. Can you please help me knowing the root cause of this error?

Thanks in advance,

Vikas