LrDialogs.runOpenDialog not working inside LrExportServiceProvider - lightroom

Question

I am trying to create a Lightroom Classic Export Service Provider plugin that has a Browse... button in the sectionsForTopOfDialog to allow the user to choose a Folder related to the plugin. The open dialog is attached to the action of the viewFactory:push_button, and the dialog opens successfully, but it seems like the rest of the push button's action is never executed, as if the runOpenPanel function never returned.
How can I create a Browse button to allow the user to select a folder and get the result? (I want to store the result in the propertyTable, this part is omitted from the code.)
Complete plugin code to reproduce the issue below. (Create a folder named runOpenDialogMCVE.lrdevplugin folder, add these files, load it as a Lightroom plugin.)
-- Info.lua
return {
LrSdkVersion = 3.0,
LrSdkMinimumVersion = 1.3, -- minimum SDK version required by this plugin
LrPluginName = "RunOpenPanel MCVE",
LrToolkitIdentifier = 'com.example.lightroom.runopenpanelmcve',
LrExportServiceProvider = {
title = "LrDialogs.runOpenPanel MCVE",
file = 'ExportServiceProvider.lua',
},
VERSION = { major=0, minor=1, revision=0 },
}
-- ExportServiceProvider.lua
local LrDialogs = import 'LrDialogs'
local LrLogger = import 'LrLogger'
local LrView = import 'LrView'
local logger = LrLogger("LrDialogs.runOpenDialogMCVE")
local viewFactory = LrView.osFactory()
logger:enable("print")
local ExportServiceProvider = {}
function ExportServiceProvider.sectionsForTopOfDialog( propertyTable )
return {
{
title = "LrDialogs.runOpenDialog MCVE",
viewFactory:row {
viewFactory:push_button {
title = "Browse...",
action = function ()
logger:trace("Opening dialog...")
LrDialogs.message("Will open dialog after this.")
local result = LrDialogs.runOpenPanel( {
title = "Location",
prompt = "Choose",
canChooseDirectories = true,
canChooseFiles = false,
allowsMultipleSelection = false,
} )
-- I would expect the code below to execute, but it never does.
-- No trace is printed and none of the dialogs below are shown.
logger.trace("Closing dialog. "..tostring(result))
if result ~= nil then
logger:trace("Chosen folder: "..result[1])
LrDialogs.message("Choseen folder: "..result[1])
else
logger:trace("Cancelled")
LrDialogs.message("Cancelled")
end
end,
},
},
},
}
end
return ExportServiceProvider
I'm using Lightroom version 12.0 on MacOS.