[Update 2018-07-09]: Please check for Malwarebytes updates, you need the Malwarebytes 18.104.22.1682 update with the component package version: 1.0.391.
You may see this during an update if you have Malwarebytes 3 installed:
An error occurred while trying to rename a file in the destination directory: MoveFile failed; code 183.
Huge thanks to the folks at Malwarebytes for quickly investigating this for us and they plan to have this fixed in their Malwarebytes 3 product very soon. They'll update us here as soon as they're done.
As 1Password use encryption libraries, it can sometime trip the ransomware protection in anti-malware solutions as it did in Malwarebytes 3. The Malwarebytes team have identified where 1Password (and other related installers) is doing this and they will fix this.
For now, here's how to work around this issue; do not abort or cancel the install:
(Thanks to v2qrY7y2JZWy7Zup for helping us with this)