Hevak, sounds like it.
Since I restarted a new career (again) after v1.1.3 and using only stock parts, at least for the beginning, I tought it wasn't mod related, my mistake.
From EPL forum.
Posted Friday at 5:31 AM · Report post
Actually, the staging issue is unrelated (and was present in 1.1.2, just not obvious).
The problem with the launch clamps is indeed EL's fault, but for a very different reason: EL replaces the default launch clamp module with its own via MM (to get correct extension on uneven ground). Because EL is not loading properly, the launch clamps have no working module and thus do not work.