In addition to the forum post thought it would be relevant to add the information here too.
This error can be reproducible atleast on cxgames 8.1.4
Steps needed to get around it.
1# Download WLDAP32.dll from the internet. eg; http://www.dll-files.com/dllindex/dll-files.shtml?wldap32
2# then extract wldap32.dll into "~/.cxgames/bottle/drive_c/windows/system32" depending on the name of your bottle.
3# ran "CrossOver Games -> Run a Windows command" Selected bottle, command "winecfg"
4# In Winecfg select tab "Libraries"
5# In "New override library for" type: wldap32.dll
6# Press "Add", then "Apply" and "Ok"
Now I tried to write this guide in a manner of way that even a novice user of cxgames may reproduce the steps necessary to fix the error,
I hope this helps. Enjoy gaming Garry's Mod now =)