Hey @DaDon089! Welcome to the Forums!
(Truncated to just additional steps as @EliasWick explained above)
I don’t see anything immediate from this, so there’s a few things to try here. First is to verify your install of 5.1.
If that does not work, you will need to add Editor symbols for debugging and try running again, then share what the new error message is.
Any additional specifics will go a long way in solving your problem!