When importing into Inventory or AssetCloud OnPremise, if the import sheet has too many errors it will eventually just stop trying to import. Closing the program will not clear the import and there is no option to cancel. To clear the stuck import you will need to be on the server. Open SSMS. Run a new query

Copy the text below and paste it into the field

use WaspTrack
update dbo.app_option set app_option_value = '' where app_option_code = 217

Click on Execture