# Pydio Sync Client Error 403, Pydio 8.0.2 **URL:** \ **Category:** Sync Client\ **Created:** [May 18, 2018, 2:16pm UTC](https://forum.pydio.com/t/pydio-sync-client-error-403-pydio-8-0-2/1129 "2018-05-18T14:16:00Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![insan0r](https://avatars.discourse-cdn.com/v4/letter/i/51bf81/32.png) [@insan0r](https://forum.pydio.com/u/insan0r)\ **Post date:** [May 18, 2018, 2:16pm UTC](https://forum.pydio.com/t/pydio-sync-client-error-403-pydio-8-0-2/1129/1 "2018-05-18T14:16:00Z")
After the upgrade from 5.6 to 8.0.2 the sync client (1.29, Windows x64) stopped working. I can’t even add the pydio Server to the client (unknown/wrong credentials). I checked: runttests.php - no issues I did a /api/my-files/ls - no issues Then I fired up wireshark and analyzed the http traffic from my client to the server and found: **Client Request:** Hypertext Transfer Protocol GET /api/pydio/state/plugins?format=json HTTP/1.1\r\n [Expert Info (Chat/Sequence): GET /api/pydio/state/plugins?format=json HTTP/1.1\r\n] Request Method: GET Request URI: /api/pydio/state/plugins?format=json Request Version: HTTP/1.1 Host: FQDN\r\n Connection: keep-alive\r\n Accept: _/_\r\n Accept-Encoding: gzip, deflate\r\n Authorization: Basic asdf\r\n Credentials: asdf:asdf User-Agent: python-requests/2.5.1 CPython/2.7.10 Windows/7\r\n \r\n [Full request URI: FQDN/api/pydio/state/plugins?format=json] [HTTP request 1/1] [Response in frame: 511] **Server response** Hypertext Transfer Protocol HTTP/1.1 403 Forbidden\r\n [Expert Info (Chat/Sequence): HTTP/1.1 403 Forbidden\r\n] Request Version: HTTP/1.1 Status Code: 403 Response Phrase: Forbidden When I open FQDN/api/pydio/state/plugins?format=json in my browser, I get prompted for credentials and afterward the page loads just fine. When I open user:password@FQDN/api/pydio/state/plugins?format=json the page loads directly (as it should). Any suggestions what I might be missing would be greatly appreciated. Cheers Simon PS: I removed all Domains and http from the links due to new user limitation ---
**Author:** ![zayn](https://avatars.discourse-cdn.com/v4/letter/z/a87d85/32.png) [@zayn](https://forum.pydio.com/u/zayn)\ **Post date:** [May 21, 2018, 7:28am UTC](https://forum.pydio.com/t/pydio-sync-client-error-403-pydio-8-0-2/1129/2 "2018-05-21T07:28:06Z")
Hi, could you try to clear the cache located in `pydio/data/cache` and remove all the `plugins_` files, you can also try to reinstall the sync client if any of the above was of any use, i will ask the devs if they have an idea. ---
**Author:** ![insan0r](https://avatars.discourse-cdn.com/v4/letter/i/51bf81/32.png) [@insan0r](https://forum.pydio.com/u/insan0r)\ **Post date:** [May 22, 2018, 7:10am UTC](https://forum.pydio.com/t/pydio-sync-client-error-403-pydio-8-0-2/1129/3 "2018-05-22T07:10:40Z")
Hi zayn Thanks for the reply. I cleared the files in data/cache/ which resulted in a “Welcome to Pydio Install” wizard, instead of the regular site - good thing I took a backup. If someone else is trying this solution attempt: Just delete the \*.ser files or leave at least the first\_run\_passed & admin\_counted files to keep the system running. I can’t find any files nor folders called plugins\_ on my server. `[~/public_html/_clippings]# find ./ -type d -name plugins_` I installed the client on various PCs and also tried older versions - same result. Thanks for the help, I’ll keep this thread updated. ---
**Author:** ![zayn](https://avatars.discourse-cdn.com/v4/letter/z/a87d85/32.png) [@zayn](https://forum.pydio.com/u/zayn)\ **Post date:** [May 22, 2018, 8:17am UTC](https://forum.pydio.com/t/pydio-sync-client-error-403-pydio-8-0-2/1129/4 "2018-05-22T08:17:12Z")
Hi, it is really weird that after you cleared the cache it showed you the install wizard as the cache and the wizard are not even remotely related, usually the cache can also be cleared via the interface on the plugins menu. > [@insan0r](#): > > first\_run\_passed & admin\_counted if you remove the `first_run_passed` it will trigger the install wizard. ---
**Author:** ![insan0r](https://avatars.discourse-cdn.com/v4/letter/i/51bf81/32.png) [@insan0r](https://forum.pydio.com/u/insan0r)\ **Post date:** [May 22, 2018, 9:07am UTC](https://forum.pydio.com/t/pydio-sync-client-error-403-pydio-8-0-2/1129/5 "2018-05-22T09:07:39Z")
Nevermind, it looks like just a missunderstanding. I understood that I’ll have to clear the files in the cache folder not just the ones starting with “plugins\_”. Nevertheless, I couldn’t fix my Issue by clearing the cached “plugins\_\*” files. ---
**Author:** ![zayn](https://avatars.discourse-cdn.com/v4/letter/z/a87d85/32.png) [@zayn](https://forum.pydio.com/u/zayn)\ **Post date:** [May 22, 2018, 9:10am UTC](https://forum.pydio.com/t/pydio-sync-client-error-403-pydio-8-0-2/1129/6 "2018-05-22T09:10:11Z")
hi sorry if i wasn’t clear enough