OCLP + BootCamp fail

Hello Guys,
I have a 2015 Macbook Pro (15"), with MacOS 15 freshly installed on it. It just came out of the repair shop with a brand new SSD, and MacOS 15 with OCLP installed by them. I installed Win10 with bootcamp yesterday, and when I wanted to go back to MacOS, it started loading, and then got stuck around the 3rd of the loading screen.

I have tried booting from an usb oclp recovery drive, I got black screen.
I have tried injecting oclp back (if i remember correctly that was the term).

I have no idea what could be wrong, however, I already started working on the MacOS part (and I don't have iCloud), so I really dont want to reinstall.

Any help would be appreciated.