I can't open my workspace?

Hello everyone. I have a problem with my MCreator. I was making mods in the MCreator app. Another day, when I tried to enter my mod to add new things, I encountered the loading screen. I waited for a long time. The console section was open and I could see what percent was loaded. After waiting for 1 or 1.5 hours, it became 100%, but instead of turning it on, the "Internet Connection Lost" message suddenly appeared. However, my internet was still working and I could use the internet. But even though I have internet, instead of opening my mod's workspace the program said "Your internet connection is gone." I've been trying to open it for 1-2 months, but it doesn't open. I tried again today and it didn't work. It should open now but it doesn't. That's why I decided to write here. Below I took a screenshot of the screen that appeared when I tried to open it. I made this a link and put it up.

Please help me I need the program.

I'm using MCreator 2020.2 for 1.12.2 mod

https://i.hizliresim.com/36ev9xw.png