On the 15 August we got a few complaints that customers get this run time error 5 when they are trying to download application via U90Ladder.
We investigated more and found that this is an issue caused by the latest Microsoft update.
In order to solve this issue until Microsoft will release new update - Please try to uninstall the update via "New installed updates" or roll back before the update.
Please see below link to Microsoft update and known issues:
*For other version of Windows Microsoft KB article number will be different.
Article can be found in the below link: