TypeError when calculating statistics on 11 million messages

[devmount]

I'm reporting this issue because I'm loading 11.36 million messages and calculating statistics.
My environment is Windows 11, Thunderbird 143.0.1, and ThirdStats 1.12.1.
The debug message is as follows:

TypeError: can't access property Symbol.iterator, Startup.KeyShortcuts is undefined

Stacktrace
_addWindowHostShortcuts@resource://devtools/client/framework/toolbox.js:1388:24
_addChromeEventHandlerEvents@resource://devtools/client/framework/toolbox.js:1210:10
open@resource://devtools/client/framework/toolbox.js:1029:12

Originally posted by @Tamura-Teika in #445

[devmount]

@Tamura-Teika The error message you are seeing seems to be completely unrelated to ThirdStats. Do you have any output when turning the debug mode on?