time.clock() has been removed as of Python 3.8, which causes the server to fail.
See:
API and Feature Removals
The following features and APIs have been removed from Python 3.8:
...
The function time.clock() has been removed, after having been deprecated since Python 3.3: use time.perf_counter() or time.process_time() instead, depending on your requirements, to have well-defined behavior. (Contributed by Matthias Bussonnier in bpo-36895.)
time.clock() has been removed as of Python 3.8, which causes the server to fail.
See:
-- https://docs.python.org/3/whatsnew/3.8.html#time