The file exists, but it is locked by something apparently. I can open the file in windows explorer without problem and see the contents of the zip.

Edit to add: the game did load on the second attempt.

Adding a note: THERE ARE NO RADARS IN MY TECH TREE!!!!

I have started to play this mod. I have found the first tier (2 first science) very well thought. But the 3rd tier (mechanical engineering (red with gear?)) shows me a lot of technologies that it is not clear where they lead or what to do with them. For example, waste management doesn't have any way ...

I am not sure if this is intentional

https://imgur.com/a/rm1rS6q

I am not sure how to categorise this as this is not the usual experience for many people.

I am flying on a plane as I write and post this I have access to internet (it is horrible). But I find it awesome.

I can access the web, (all very slow) I could do many things except clicking on the Mods ...