Could you give us a few more information about this. I did not totally understand it.
You tried to spawn a base. Did you spawn it and it did not appear, or where you not able to spawn it in the first place?
Did you switch to the library tab where the ready to spawn structures are listed?
think they mean this Jasch, i’m guessing on completion the bp was done but didnt show up to spawn?, I would suggest double checking the correct tabs are checked for spawning (sv,hv,cv) under completion at the top.