Can't start more than 2 OSRS clients

[Tijgaarrr]

I currently have 2 clients open and I try to run another client and I get the following error, any ideas?

[RoundBox]

You need to spam click them or use a script to auto execute the game launcher super quick.

But spam clicking you should be to get to about 4 clients

[FeliiTheBot]

Check out this guide