You never read the FAQ part of the documentation. It mentions a solution for this EXACT problem - you did now upload your templates correctly. Re-upload your avatar templates and all should be well.
Donate to UBBDev today to help aid in Operational, Server and Script Maintenance, and Development costs.
Please also see our parent organization VNC Web Services if you're in the need of a new UBB.threads Install or Upgrade, Site/Server Migrations, or Security and Coding Services.