Hey, I was having the same issue. Restarting my internet connection seemed to help. But buying an ethernet adapter fixed the issue altogether. No more libcurl43 error and no more crashes.
I know you probably have this issue fixed already but might be useful if someone else is having trouble and...
I've been playing fallout4 all day, I went into a elevator and it kept going, never stopped, waited 5 minutes, must of been a bug. How bout you, whatcha do today?