# Error in Updater **URL:** https://forum.duplicati.com/t/error-in-updater/502 **Category:** Support **Created:** [September 8, 2017, 2:53am UTC](https://forum.duplicati.com/t/error-in-updater/502 "2017-09-08T02:53:47Z") **Posts on this page:** 1 **Showing post:** 4
### Author: ![JonMikelV](https://forum.duplicati.com/letter_avatar_proxy/v4/letter/j/439d5e/32.png) [@JonMikelV](https://forum.duplicati.com/u/JonMikelV) #### Post date: [September 8, 2017, 3:58pm UTC](https://forum.duplicati.com/t/error-in-updater/502/4 "2017-09-08T15:58:05Z")
Got it - I have an Ubuntu VM sitting around, I’ll see if I can replicate the problem. Just out of curiosity is it actually working OK even though it’s logging that error? And to what destination type are you pointing (S3, SFTP, WebDAV, etc.)? My uneducated GUESS is that the issue is related to certificates. Windows ships with a bunch of Root and Intermediate Certificate Authorities (CA) which I believe are kept fresh with Windows Update. Unfortunately, it appears Mono’s certificate store is empty by default. This page ([FAQ: Security | Mono](http://www.mono-project.com/docs/faq/security/)) suggests four solutions, 3 of which are potentially useful: 1. Make sure `ca-certificates-mono` is installed (if you’ve got Mono 3.12.0 or newer) 2. Use the Mono `certmgr.exe` tool to add root certificates into the Mono Trust store 3. use the Mono 1.1.10+ `mozroots.exe` tool to download and install ALL off Mozilla’s root certificates --- _[View the full topic](https://forum.duplicati.com/t/error-in-updater/502)._