Thread:Extension talk:LiquidThreads/Is it possible to access the discussion contributions from the wiki after removal of LQT?/reply

It's "Theme:Talk:SamplePage/Contribution1" or "Thread:Talk:SamplePage/Contribution1"? It should probably be the second.

I guess the problem is the Thread: namespace that creates LQT, that is no longer present when not installed. You could try defining the Thread: namespace again in LocalSettings.php and you may be able to access messagess as individual pages, although I haven't tested it.