I saw this in an email message.

Problem:
Other than the auxiliary verb “can”, there is no verb in this (non-)sentence.

Explanation:
The word “setup” is a noun and means the way in which something is planned or arranged.

The writer of the email message should have used the verb phrase “set up” instead of the noun “setup”.

The verb phrase “set up” in the context of what was intended by the writer means arrange or establish.

In other words, “setup” and “set up” are not synonyms!

Solution:
“We can set up a meeting.”