Minecraft and code connection of Minecraft cannot be connected

Hi, 

I have minecraft (v1.14.0) and code connection (v1.50). It stopped connecting when I enter

/connect 192.168.x.x:xxxxx

After a while,  it says could not connect to the server.

 

When it happened previously, I reinstalled code connection and it worked. So I did it again. Then it said "connected to server," but it does not move to the next screen of choosing Code.org, MakeCode, and etc.

 

I tried the same in three different PC, but the same happened.

 

Please help me out.. Is it another updating issue, as I saw minecraft has been updated today. Thanks!