Sphinx extension error (sphinxprettysearchresults): for event 'build-finished', error "exception: name 'unicode' is not defined" is persistent

[Alex-TheWriter]

In my Sphinx project, when trying to generate the output HTML code using the "sphinx-build -E" command, I get the following persistent error:
"Extension error (sphinxprettysearchresults):
Handler <function build_search_snippets at 0x0000022451ACBF60> for event 'build-finished' threw an exception (exception: name 'unicode' is not defined)"