Board Game Arena

In one of my recent game (Table #541585744), at move 466 on Silver Lake, I wanted to play a project, then use the extra action bonus and plenty of X tokens to fill another project in my hand. This would have been projects #7 and #8 (and yes, I had the workers and everything)
But, running out of bonus token, I could not complete the 8th project, so I changed my plan for the best and used the additional action to play an animal instead.

I read the rulebook again, and I am not 100% sure that the token is required. Can someone confirm it is the case, so that it is implemented the way it should be ?

If you mean supporting conservation projects, yes, you only are able to support 7 throughout the whole game.

Personally, Ive only ever seen this once.