im getting an error in cmd window and cant find the right plugin to update 

Error while compiling: Build.cs(366,56): error CS1061: Type `PrefabAttribute.Library' does not contain a definition for `GetAll' and no extension method `GetAll' of type `PrefabAttribute.Library' could be found. Are you missing an assembly reference?

Hey! Please, use plugin's support thread to report any problems with it.

i would do if i could find the build plugin
this site is not as easy to navigate or find anything like oxide

Support sections are found the same way they were on oxidemod.org, via a button on the plugin's page. Both can be found via searching. This issue has also been posted before (which can be found by searching as well), solution would be to update.

Is anyone able to help. I'm trying to get plugins working on my local sever, specifically the Build plugin but when I start my sever I get the following error messages,

Error while compiling: Build.cs(298,54): error CS1061: Type `PrefabAttribute.Library' does not contain a definition for `GetAll' and no extension method `GetAll' of type `PrefabAttribute.Library' could be found. Are you missing an assembly reference?
Sub-emitters must be children of the system that spawns them
Sub-emitters must be children of the system that spawns them

Do you have oxide / umod installed?