Here is what console says

The mod Subsurface - build beneath your base! (1.1.3) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Subsurface::on_player_cursor_stack_changed (ID 35)
BlueprintRecord cannot be read while it is a preview.
stack traceback:
[C]: in function 'get_blueprint_entities'
Subsurface/scripts/elevators.lua:119: in function 'elevator_on_cursor_stack_changed'
Subsurface/control.lua:485: in function <Subsurface/control.lua:484>

Where did you store the blueprint? In player or game library?

They were stored in player library altho they were made in vanilla version of Factorio.

Does it occur in singleplayer too? Is the blueprint stored inside a book?
I need a detailed description of what you do (you can also send me your savegame), bc this seems to be an edge case. I can't reproduce by creating a blueprint in vanilla, placing it in "my blueprints" and grab it with the mod enabled

Can confirm. Blueprints work in singleplayer, they do NOT work in multiplayer. The moment you try to even open them it gives the bug.
This is confirmed in both personal, and save related.

After i LOADED the MP save in SP and interacted with blueprints and placed one down. Then saved and loaded back into MP of that save. It works just fine now..

This will be fixed in the next release