Can't save document to cloud

Hello,
I am experiencing an issue with Adobe Acrobat Pro Desktop on a new computer.
Observed behavior:
- The option “Save to Cloud” is not available.
- There are no Cloud / Online sections in Preferences.
- When clicking links in Acrobat that should open cloud-related pages, the browser opens but the page freezes and does not load.
Environment:
- Acrobat Pro license is active.
- The same Adobe account works correctly on another (older) computer, where all Cloud features are available.
- Adobe Cloud works normally when accessed directly in a browser (https://acrobat.adobe.com).
- Network access is not blocked (confirmed by IT).
Actions already performed:
- Multiple uninstall and reinstall cycles of Acrobat.
- Reset of local Adobe user profile and cache (OOBE and AppData folders).
- Sign out and sign in to Creative Cloud.
- Switching default browser (Edge / Chrome).
- System restarts.
The behavior remains unchanged.

Please advise on how this issue can be resolved.