[XMPP] Object reference not set to an instance of an object

Does anyone know what this means and how to fix it?

[XMPP] Object reference not set to an instance of an object.

image

File “C:\Users\D\Desktop\guy1.jpg” couldn’t be added as attachment due to the following error: Object reference not set to an instance of an object.

Hi Peter16 and Riverbc

Thanks for contributing to the thread but i’m not sure what you’re saying. the message I get is in not related to an attachment and it comes up at the start of the session for both the email accounts I have in the client.
It doesn’t appear to stop emails going out or coming in. what is the meaning of [XMPP] in the error message?