What do the Inventory, Coin and Other fields have in them? The total field is just a sum of those three. If one of those is blank it could indicate an issue with the weights listed in the inventory rows, coins listed above the weight section, or the entry in the "other" field respectively. This could cause the total weight to be blank. There can also be issues with previous attributes from having selected/used other sheets or having added attributes manually yourself but if this is a new campaign without a sheet having been used before in it you shouldnt have any issues with that. If the advice above doesnt help post a screenshot of the inventory section and i'll see if i can see anything that looks out of place