There's no crossplay option on epic games copy, how do i change this?

There is no crossplay option in the Epic Store version: the crossplay is on by default (or rather, the crossplay version on the Steam version just means making the game support Epic Online Services, which the Epic version supports by default).

The reason why you're currently unable to play with your friends on Steam is that we've unfortunately been having some issues with the Epic Store's backend since the last update: we are unable to set the latest update live on the Epic Store, which means the Epic build is currently not compatible with the Steam version. The issue is something Epic needs to resolve: we have been in touch with them, but I'm afraid we haven't gotten any ETA on when the issue will be resolved.

I'm sorry for the inconvenience - this is a really frustrating situation for us too. I cannot endorse piracy, but in my personal opinion getting a crack for version 1.6.19.1, or perhaps having your friend share the game files with you could be an option worth considering. I would also consider getting a refund on the Epic Store and buying the game on Steam instead.

Sorry to hear that. :/ I would've thought a core functionality like this not working would've been a good enough reason for them to offer a refund.

There's unfortunately not much us devs can do about this, but you could send a support request to our publisher Daedalic, they could most likely give you a Steam key: https://www.daedalicsupport.com/en/support-formular/

Again, I'm sorry about the trouble. I really wish we can get Epic to do something about the situation as soon as possible.