Windows Build: Qt5WebSockets.dll dependency missing for WebSockets Data Streamer

[late-in-autumn]

Manifestation

• When launching PlotJuggler (Windows build), the WebSocket Server option is missing from the list of options in the Streaming section
• Using dependency walker on the DataStreamWebSocket.dll, I see the Qt5WebSockets.dll dependency is missing

C:\apps\Dependencies\Dependencies.exe -depth 1 -chain DataStreamWebSocket.dll
├ DataStreamWebSocket.dll (ROOT) : DataStreamWebSocket.dll
|  ├ Qt5WebSockets.dll (NOT_FOUND) :
|  ├ Qt5Network.dll (ApplicationDirectory) : Qt5Network.dll
|  ├ Qt5Widgets.dll (ApplicationDirectory) : Qt5Widgets.dll
|  ├ Qt5Gui.dll (ApplicationDirectory) : Qt5Gui.dll
|  ├ Qt5Core.dll (ApplicationDirectory) : Qt5Core.dll
|  ├ MSVCP140.dll (WindowsFolder) : C:\WINDOWS\system32\MSVCP140.dll
|  ├ VCRUNTIME140.dll (WindowsFolder) : C:\WINDOWS\system32\VCRUNTIME140.dll
|  ├ VCRUNTIME140_1.dll (WindowsFolder) : C:\WINDOWS\system32\VCRUNTIME140_1.dll
|  ├ api-ms-win-crt-runtime-l1-1-0.dll (ApiSetSchema) : C:\WINDOWS\system32\ucrtbase.dll
|  ├ api-ms-win-crt-string-l1-1-0.dll (ApiSetSchema) : C:\WINDOWS\system32\ucrtbase.dll
|  ├ api-ms-win-crt-heap-l1-1-0.dll (ApiSetSchema) : C:\WINDOWS\system32\ucrtbase.dll
|  ├ KERNEL32.dll (WellKnownDlls) : C:\WINDOWS\system32\kernel32.dll

Workaround

• Download and install Qt 5.15.2 MSVC 2019 x64 using the Qt online installer
• Copy Qt5Websockets.dll from the Qt installation to the PlotJuggler installation directory
• Use Dependency Walker to make sure no DLLs are missing
• Re-launch PlotJuggler, the WebSocket Server option shows up

Versions affected

• Tested against Windows installer 3.11.1 and this issue is present