# Cells Sync does not work **URL:** \ **Category:** Sync Client\ **Tags:** linux\ **Created:** [November 7, 2021, 10:18pm UTC](https://forum.pydio.com/t/cells-sync-does-not-work/4137 "2021-11-07T22:18:33Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Flo](https://avatars.discourse-cdn.com/v4/letter/f/b38774/32.png) [@Flo](https://forum.pydio.com/u/Flo)\ **Post date:** [November 7, 2021, 10:18pm UTC](https://forum.pydio.com/t/cells-sync-does-not-work/4137/1 "2021-11-07T22:18:33Z")
Hello, I want to set up a sync between a pc and my Cells 3.0 server. But it does not work 😅. To begin, Cells 3.0 is installed on an ubuntu 20.04 in a Proxmox container. With Apache / MySQL. After my various tests, here is the configuration of the sites : ```auto +---+----------------------------+-------------+--------------+ | # | BIND(S) | TLS | EXTERNAL URL | +---+----------------------------+-------------+--------------+ | 0 | https://pydio.local:8443 | Self-signed | | +---+----------------------------+-------------+--------------+ | 1 | https://192.168.10.19:8443 | Self-signed | | +---+----------------------------+-------------+--------------+ | 2 | http://pydio.local:8080 | No Tls | | +---+----------------------------+-------------+--------------+ ``` I am using Cells Sync 0.9.2. And when I want to sync a folder, I can’t (invalid certificate) : ![Sans titre](https://canada1.discourse-cdn.com/flex032/uploads/pydio/original/2X/5/57028766ffbccfe84257f79cb7db028999f61392.png) So I tried in http, but the authentication part does not work (when I have the redirection on the web page, I am automatically disconnected) (with an error in the logs) : ```auto 2021-11-07T22:21:54.585+0100 ERROR pydio.rest.frontend Rest Error 401 {"error": "{\"id\":\"login.failed\",\"code\":401,\"detail\":\"Login failed\",\"status\":\"Unauthorized\"}"} ``` I tried installing a Let’s encrypt certificate, but it didn’t work. But is it possible to make the sync work with a self-signed certificate or in http ? Many thanks, Florian ---
**Author:** ![charles](https://yyz2.discourse-cdn.com/flex032/user_avatar/forum.pydio.com/charles/32/3_2.png) [@charles](https://forum.pydio.com/u/charles)\ **Post date:** [November 8, 2021, 3:37pm UTC](https://forum.pydio.com/t/cells-sync-does-not-work/4137/2 "2021-11-08T15:37:12Z")
Hi, what’s the OS on the cells-sync side ? When using self-signed, you would have to grab the generated root CA (under cells WORKING\_DIR/certs) and install it on your client machine. Better is to use Let’s Encrypt but you must have a proper domain name! ---
**Author:** ![Flo](https://avatars.discourse-cdn.com/v4/letter/f/b38774/32.png) [@Flo](https://forum.pydio.com/u/Flo)\ **Post date:** [November 8, 2021, 5:44pm UTC](https://forum.pydio.com/t/cells-sync-does-not-work/4137/3 "2021-11-08T17:44:42Z")
Client is Windows 10. After a few tests, it works ! It was a small thing, but just that I didn’t know how to do it. Thank you very much for your reactivity and your help. Florian ---
**Author:** ![jamiebiswas](https://avatars.discourse-cdn.com/v4/letter/j/90db22/32.png) [@jamiebiswas](https://forum.pydio.com/u/jamiebiswas)\ **Post date:** [December 13, 2021, 5:34am UTC](https://forum.pydio.com/t/cells-sync-does-not-work/4137/4 "2021-12-13T05:34:15Z")
Thanks a lot for your question. It’s very good to know that you have resolved your problem. Basically, some days ago I have also faced this type of error. So for that reason, I researched well and found some solution which is not the same, so I am sharing all the details with you. You can check once - Pre-requisites In order to compile and run the Cells-Sync client, you must fulfil the following requirements: GOLANG development toolchain properly installed (tested with 1.12 and higher) NodeJS/NPM environment in order to compile the frontend, you need an up-to-date version of NPM (tested with node version 12.X) Compilation instructions Change directory to app/ux/ To load frontend dependencies run npm install To compile the frontend, run npm run build Basically I also want to attach this thing to my [mobile erp](https://www.exactlly.com/blog/index.php/mobile-erp-technology-and-its-benefits/). To pack the frontend inside the binary (not mandatory if you are running on the same machine where $GOPATH is available), install github(dot)com/gobuffalo/packr/packr tool and run make a clean pack at the root of the repository. Due to a dependency issue, until we switch to modules or until this dependency master is stable again, you have to apply the following before calling the make command: cd Github(dot)com/zserge/webview git checkout 9c1b0a888aa40039d501c1ea9f60b22a076a25ea Compile binary by running make cli The resulting cells-sync binary should be good to go. Running cells-sync Once you have downloaded or compiled cells-sync for your platform, simply run: ./cells-sync start This both starts the system tray icon and the synchronization agent in background. To run the agent without any UX, use cells-sync start --headless. Other available commands Use help to display the available commands: $ ./cells-sync --help Usage: ./cells-sync [flags] ./cells-sync [command] Available Commands: add Add a new task via command line autotest Basic unidirectional sync between two local folders (under your temporary directory) bgstart Start sync tasks from within service capture Capture snapshots inside JSON file - do not perform any actual tasks delete Delete existing sync via command line edit Exit existing sync via command line help Help about any command service Manage service: install,uninstall,stop,start,restart start Start sync tasks systray Launch Systray version Display version webview Launch WebView Flags: -h, --help help for ./cells-sync Use “./cells-sync [command] --help” for more information about a command.