LMI Desktop Client Connection Error - The connection with the server was reset (12031)

Hi Mlukay, welcome to the community.

When I have see error 12031 before, it was related to the TLS encryption settings of the computer. 

In Windows:

1. Open the Control Panel
2. Click Internet Options
3. Click the Advanced tab
4. Scroll down to the Security section
5. Check the boxes next to Use TLS 1.0, Use TLS 1.1, and Use TLS 1.2
6. Click Apply
7. Click OK