Hang: blank (white) dialog at startup

Hi,

Yesterday I subscribed to Adobe Acrobat Pro. I downloaded and installed it using the Creative Cloud Desktop app.
When starting the app it just hangs: it starts with the Home screen as expected, but after about 3 seconds the whole screen is filled with a semitransparent black overlay and a blank (white) square is displayed in the center (see screen dump). The whole app freezes. It becomes completely unusable and the only way to close it is to kill the task/process.

I have tried:

-Uninstalling and reinstalling
-Ending Task in task manager, for just Acrobat as well as all adobe related software
-Restarting my computer

I have tried all these options multiple times in various orders and combinations.

All other apps work fine (Photoshop, Bridge, Lightroom Classic, InDesign, Topaz Gigapixel, Affinity Studio, Microsoft Office etc.).

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System details:

Adobe Acrobat Pro Version: 26.1 (latest)

Windows: Windows 11 Pro 64-bit
Version: 25H2
OS build: 26200.8655

NVIDIA GeForce RTX 2060
NVIDIA Studio Driver, version: 610.47 Release date: Tue May 26, 2026

CPU: AMD Ryzen 9 5950X
RAM: 64 GB

Monitor: Eizo CG2730 - 2560x1440 - Wide Gamut - Xrite i1 Display