Tim Bo

Hello Maxim,

thank you very much for looking into this and fixing the problem!

I've already tried it with DVLS 2026.3.6.0 and RDM 2026.2.2.2, and uploading the images—as well as adding them to the asset entries—has been working without any issues so far.

Over the next few days, I'll be switching from the custom images to the system images—if any problems come up again, I'll post an update here.

Hello Patrick,

thank you very much for the quick reply. Unfortunately, I've been busy the last few days and haven't been able to look into it further yet.

Below is the requested information and the log, in which I have changed the username to protect the user's anonymity.

Devolutions Server Version: 2026.2.15.0

Devolutions Server Docker Tag: release-2026.2

Remote Desktop Manager Version: 2026.2.2.2 (AUR Package used on CachyOS)

Host OS (DVLS): Debian 13

Path to Trigger the failure:

Devolutions Server: web UI Administration > Image Management

Remote Desktop Manager: RDM System Images

Thank you very much for your support!

Hi everyone,

I’m running a Devolutions Server with Docker behind a reverse proxy, which works well overall and was straightforward to set up thanks to the excellent documentation.

When I try to upload custom images via RDM, it works; however, when I try to upload them persistently, this isn’t possible either via RDM or through the Devolutions Server’s web interface, and the error message “The type initializer for 'Windows.Win32.PInvokeGdiPlus' threw an exception.” is displayed.

I also checked the stack's logs using `docker compose logs` in the stack directory—but unfortunately, there weren't any further details there. Unfortunately, I haven't found any other variables or workarounds (such as a bind mount for images to mount the images).

I would really appreciate any suggestions for a solution.