Posting here just in case someone had the same issue as me. I've updated OCLP from 0.6.8 to 1.0.1 and installed newer OpenCore EFI. This broke the EFI and my MBP 15 2015 couldn't boot anymore. The system didn't recognize EFI as a valid one. I had to copy EFI from USB drive (generated by the same OCLP 1.0.1) into internal SSD's EFI.
More details here:
https://www.reddit.com/r/OpenCoreLegacyPatcher/comments/16zxtor/_/k3k2m0y
Wasn't able to file an issue on official github, so posting here as the branch is seemingly relevant.
More details here:
https://www.reddit.com/r/OpenCoreLegacyPatcher/comments/16zxtor/_/k3k2m0y
Wasn't able to file an issue on official github, so posting here as the branch is seemingly relevant.