When configuring your searchableAttributes (or other index configuration settings) you may see an error that indicates an attribute was not found:
These errors can be safely ignored. For auto-fill purposes, our dashboard samples a small subset of your records. The small subset is chosen so that the dashboard itself maintains good performance and does not need to exhaustively search the full index -- which could be upwards of millions of records for some clients -- on each refresh.
If there are attributes that aren't on every record, they may not be found in that small subset and the warning is displayed. However, it will not prevent any functionality if the attributes are indeed present on the records.