Problem has been solved 
Created the project from scratch again in 4.20. Everything is working nicely now. Obviously a massive pain trying to do it all again, but it’s better than it not working! Thanks for the help everyone!
Problem has been solved
Created the project from scratch again in 4.20. Everything is working nicely now. Obviously a massive pain trying to do it all again, but it’s better than it not working! Thanks for the help everyone!