Dungeons & Dragons Online (206480)

Compatibility Report

• Name of the game with compatibility issues: Dungeons & Dragons Online
• Steam AppID of the game: 206480

System Information

• GPU: NVIDIA Corporation NVIDIA GeForce GTX 760/PCIe/SSE2
• Driver/LLVM version: 4.6.0 NVIDIA 470.86
• Kernel version: 5.10.95
• Link to full system information report as Gist:
• Proton version: 4.11-13, 5.0-10, 5.13-6, 6.3-8, 7.0-1

I confirm:

• that I haven't found an existing compatibility report for this game.
• that I have checked whether there are updates for my system available.

steam-$APPID.log

$HOME/steam-$APPID.log

Symptoms

The game won't launch.

Reproduction

The following is with Proton 4.11-13

1. Launch game by clicking play in steam.
2. Wait for the launcher to download updates.
3. It will stop downloading updates and will say Progress and Failed in the third column where the progress bar is.

• The error message reads Unable to decrypt and de-serialize the data downloaded from the server.
• Under status a countdown is shown which is the number of seconds before the launcher attempts to download the final patch again.
• When the download progress of the patch fails the second time, a different error message is shown: An update error occurred:
• After a few moments of the loading bar at the bottom doing a loading animation the following error is shown: Uknown Error:E_FAIL

At one point I got the following error message but wasn't able to reproduce it: Error: [Name:client_map_1.dat-43244][Source:client_ (The rest of this error message is cut off.)

The following is with Proton 5.0-10

1. Launch game by clicking play in steam.
2. Launcher downloads patches.
3. It will stop downloading updates and will say Progress and Failed in the third column where the progress bar is.

• The error message reads Unable to decrypt and de-serialize the data downloaded from the server.
• Under status a countdown is shown which is the number of seconds before the launcher attempts to download the final patch again.
• When the download progress of the patch fails the second time, a different error message is shown: An update error occurred:
• After a few moments of the loading bar at the bottom doing a loading animation the following error is shown: Uknown Error:E_FAIL

The following is with Proton 5.13-6

1. Launch game by clicking play in steam.
2. Launcher downloads patches.
3. It will stop downloading updates and will say Progress and Failed in the third column where the progress bar is.

• The error message reads Unable to decrypt and de-serialize the data downloaded from the server.
• When the download progress of the patch fails the second time, a different error message is shown: An update error occurred:
• After a few moments of the loading bar at the bottom doing a loading animation the following error is shown: Uknown Error:E_FAIL

The following is with Proton 6.3-8

1. Launch game by clicking play in steam.
2. Launcher donwloads patches.
3. When the loading bar for the second column Overall patch dat files reaches 88% the launcher crashes.

The following is with Proton 7.0-1

1. Launch game by clicking play in steam.
2. Launcher donwloads patches.
3. When the loading bar for the second column Overall patch dat files reaches 88% the launcher crashes.

Start with the linked steam-$APPID.log and system-information Gist, comparing the reported failures across Proton 4.11-13 through 7.0-1. Done means Dungeons & Dragons Online launches and completes its patch download without the decryption or update errors or the crash.