Awesome. This is helpful. 

Oh you are in cloud. we have same issue in our on prem.

Yes we can use Incorta API end points to read and write into required Destinations.

What version you have?. I think this one has been resolved in 5  + version. This error pops up generally when underlying schema or table load in progress or snapshot file movement.

is the load_schema_incremental allow TABLE as arg?. Because I dont see that in CLI.