Ssp1 slide wont come off

After first opening it, and putting it back together correctly (following novritsch maintinence ssp1 video), A few days later (today) I am trying to take the slide off but it just wont come off, my gun is properly lubed, the slide catch is out and im putting the slide fully back then trying to rack it forward to take it off and it just wont. Please help me 🙏