@erikaleonard I am not sure if you are going off of the example tutorial or not. Photon is very usable for more than 2 players. Currently I have tested up to 17 of which the limit for the free licensing only goes to 20. This forum has a large amount of resources available. Please have a look to this thread for a good starter base. In this thread the third person tutorial example was turned into first person and a link to that project has been provided.
I have looked at your createPlayer and don’t see something that stands out but, I noticed that you have your player clone enabled. This should be disabled so instances can be created on the fly as new players join. I have tried to run 3 instances of your posted game. All 3 seemed to work well and I was able to position the players and see the movements occur. One thing I did find a bit off is the fact that you are not using the WASD standard movement.
I see also that there are two players here.
There should only be one and it should be the clone entity which will create the players in the room. It looks as if you added the second one.
Above is the standard way to handle this. PlayerRobot is the template of your clone item.