Source PC sends a RST after trying to access shared folder?

The source PC is trying to access a shared folder on the destination PC

Wireshark running on the DST PC, shows a SYN-SYN-ACK followed by some SMB communication, followed by a RST from the source PC. See here: https://i.imgur.com/DwlMW2v.png

The connection is being made so can't be a firewall blocking it?

Thanks