Cheap inverter machines have problems running 6010. AFAIK its flux related.
Does that mean that this welder is no good? No. 6010 is more for "code" work, like pipeline and boilermaking. They are "fast freeze" electrodes that have deep penetration. That doesnt mean 6010 has no use for general home fab work (great for tacking, freeze fast, strike easy) but they arent essential. 6010's also require no special storage, and can burn through paint and rust, which is great for "farm" shops.
Its not the end of the world, you can get around it by using other electrodes that the machine runs better and wouldnt be a deal breaker for most people.