I upgraded to Vault 2020 and Civil 3D 2020 SP2.0. Civil 3D object references were working just fine. A few weeks ago they just quit working. This is the same behavior as in 2018 where I am unable to reference an object that has been shared to the project. The work around for that was to open the source file that contained the object then reference creation would work. That does not work now.
Here is the previous thread:
Solved! Go to Solution.
Solved by kimjones4110. Go to Solution.
I just installed the Client 2020.2 update and the situation persists. I can however make new object references - just can't use them in a drawing.
Ok, I installed the 2020.2 update on the server and updated the database. Object references are now working.