"Cannot open file for SHA-256" was all a player saw when the launcher
could not read ReSkate.dll, at startup and again right after each
download. That is an antivirus holding or blocking the file.
- A sharing violation is waited out for up to five seconds: a file that
was just written is often held by the scanner for a moment.
- Otherwise the error names the file and its folder, says to add the
folder to the antivirus exclusions where that is the likely cause, and
carries the Windows error code.