I used the cybertruck, vezia and none of them work

For me they would be Opel Kadett,BMW 850 CSi,Jaguar XJ220,Mclaren F1 GT,Benz CLK-GTR ,Charger Daytona,Ford GT,Koenigsegg CCXR,CCGT,BMW Z1,Subaru Impreza 1995,Lancer VII and a Celica GT-Four

I tried to insert a song in mp3 format, and nothing worked

I started playing Space Trip I, I think on two-way, I am fairly sure with the F-40, and from that run onwards there was no other traffic. As such, you cannot actually finish one or two way races, and the time attack and bomb options are... pretty boring. Is this something others have encountered, and is there a fix? I can only assume clearing cloud saves will 'fix' it at least temporarily, but if this is something that occurs more than once in a blue moon it wouldn't be worth bothering to do so....

Dear Night Runners, I announce to you that our new game Retrowave 2 will be released this year on Steam. If you like Retrowave, you'll love Retrowave 2. https://store.steampowered.com/app/3331000/Retrowave_2/