This error message will be shown when uploading a projects file if an entry in the WorksClass field is not allowed. The error message will include the Source ID of the record and the value that was found.
The valid list of values for the WorksClass are:
WATER, GAS, ROAD RESURFACING, STORMWATER, ROAD CONSTRUCTION, STREET FURNITURE, GAS, POWER ABOVE GROUND, POWER BELOW GROUND, COMMUNICATIONS, FOOTPATH, LANDSCAPING/VEGETATION, OTHER
The full list of all fields and valid values can be found in How to Add your Data into SmarterWX.
Fix the value for the WorksClass field and reload your data file.