There is a problem with the mentioned cell record.
Check the log message for related messages above about the cell, the reference or the mentioned plugin. For example messages about Deleted Reference or Unresolved Form ID.
As explained in the Generation Instructions, finalize the load order, install mods, sort and resolve conflicts. Clean and error check the load order with xEdit to find and fix errors before generating LOD.
If cleaning and error checking doesn't help, make use of the official DynDOLOD support forum in case help is required to identify or to fix errors.