How can I open .rar archives in lubuntu’s built-in file manager?

Lubuntu 18.04.1 includes the lightweight but surprisingly powerful GUI file manager PCManFM 1.2.5, which can list the files within a .rar, but fails to extract or display them. Error messages (e.g. Huffman coding error) imply an inability to decode the main body of the .rar, though the directory is readable.