i7-10k, 48gb ram, was using the last public version of Rider for Unreal before it became payware. Since I can’t access it anymore, I can’t open it to provide anything much more specific, sadly.
It’s likely not useful for on device debugging, although I haven’t attempted to find out, because using it’s debugger was pretty painful. That’s a pretty significant feature if it’s not there. Otherwise, my recollection was that it was either missing or difficult to get at seeing the proper call stacks and variables, any advanced breakpoint stuff was missing or also difficult to find. Basically, everything in Rider is more difficult, if it can do it.
I think the only key combinations they share are Ctrl-S and Ctrl-T, otherwise I’m just all over the place in Rider. Like, who prints source code? Why is that even on a keybind? 
Anyway, my recommendation is to fix the problem with the VS project, VS is both free and the standard. Rider imports the VS project anyway, so it might well be just as broke. But if Rider works and VS doesn’t, there’s an indication that something in the configuration is wrong.