For completeness: Fedora 31 is as well affected from https://bugzilla.redhat.com/show_bug.cgi?id=1841460 as Fedora 32. tracer crashes with:

Traceback (most recent call last):
  File "/usr/bin/tracer", line 34, in <module>
    tracer.main.run()
  File "/usr/lib/python3.7/site-packages/tracer/main.py", line 45, in run
    return router.dispatch()
  File "/usr/lib/python3.7/site-packages/tracer/resources/router.py", line 52, in dispatch
    controller = DefaultController(self.args, self.packages)
  File "/usr/lib/python3.7/site-packages/tracer/controllers/default.py", line 62, in __init__
    self.applications = self.tracer.trace_affected(self._user(args.user))
  File "/usr/lib/python3.7/site-packages/tracer/resources/tracer.py", line 126, in trace_affected
    if not self._applications.find('kernel').ignore and self._has_updated_kernel():
  File "/usr/lib/python3.7/site-packages/tracer/resources/tracer.py", line 134, in _has_updated_kernel
    running = System.running_kernel_package()
  File "/usr/lib/python3.7/site-packages/tracer/resources/system.py", line 119, in running_kernel_package
    return System.package_manager().find_package(System.kernel_package_name(), os.uname()[2])
  File "/usr/lib/python3.7/site-packages/tracer/resources/PackageManager.py", line 67, in find_package
    return self.package_managers[0].find_package(pkg_name, search)
  File "/usr/lib/python3.7/site-packages/tracer/packageManagers/rpm.py", line 119, in find_package
    self._load_package_info_from_hdr(package, hdr)
  File "/usr/lib/python3.7/site-packages/tracer/packageManagers/rpm.py", line 201, in _load_package_info_from_hdr
    package.description = hdr[rpm.RPMTAG_SUMMARY].decode()
AttributeError: 'str' object has no attribute 'decode'

But I see that a new update is on the way.