TypeError [ERR_INVALID_OPT_VALUE]: The value "undefined" is invalid for option "saltLength"

When trying to upload I get:

```
Processing file: 0
Uploading image: 0.png
(node:2457836) UnhandledPromiseRejectionWarning: TypeError [ERR_INVALID_OPT_VALUE]: The value "undefined" is invalid for option "saltLength"
```
Any idea what went wrong?