Control panel backup not available

Community Server version: 12.1.1194
Control Panel version: 3.5.421
Document Server version:
Type of installation of Workspace: exe
OS: Windows 2019
Browser version: All
After upgrade of Control Panel to vv 3.5.421, I can no longer access settings for Backup, Restore or Storage.
Backup and Restore give the message “Error while fwetching Data”
Storage is greyed out and spins with message “Please Wait”
Control Panel log shows the error:
“error: http://localhost/api/2.0/settings/storage/s3/regions.json Unexpected token  in JSON at position 0”
How do I get past this to backup my files?

Hello @tbredemeyer

Please specify how did you update Control Panel exactly? Additionally, please provide logs of Workspace, on windows they are located in C:\Program Files (x86)\Ascensio System SIA\ControlPanel\Log\ by default.

By the way, version of Document Server is also outdated, please update it too to the actual version.

Method was to download “ONLYOFFICE_ControlPanel_Win-install.v3.5.421.exe” and “Run as Administrator”
Community Server, Document Server and XMPP server are all out of date. I will upgrade them when I know I have a working Control Panel and can backup the system.

ControlPanelLogs_10-2023.xlsx (40.9 KB)

Mind if I ask where did you download installer? Was it a part of any kind of guide on how to update?

In the Control Panel, under Update, I clicked the download button.

Please archive all logs from mentioned directory as an archive and share it with me for analysis.

By the way, do you have server backup or snapshot to rollback to previous state? Also, can you remember what was previous version of Control Panel?