Traceback (most recent call last):
File "/app/.heroku/python/lib/python3.7/site-packages/gunicorn/arbiter.py", line 583, in spawn_worker
worker.init_process()
File "/app/.heroku/python/lib/python3.7/site-packages/gunicorn/workers/base.py", line 129, in init_process
self.load_wsgi()
File "/app/.heroku/python/lib/python3.7/site-packages/gunicorn/workers/base.py", line 138, in load_wsgi
self.wsgi = self.app.wsgi()
File "/app/.heroku/python/lib/python3.7/site-packages/gunicorn/app/base.py", line 67, in wsgi
self.callable = self.load()
File "/app/.heroku/python/lib/python3.7/site-packages/gunicorn/app/wsgiapp.py", line 52, in load
return self.load_wsgiapp()
File "/app/.heroku/python/lib/python3.7/site-packages/gunicorn/app/wsgiapp.py", line 41, in load_wsgiapp
return util.import_app(self.app_uri)
File "/app/.heroku/python/lib/python3.7/site-packages/gunicorn/util.py", line 350, in import_app
__import__(module)
File "/app/app.py", line 3, in <module>
ts = api.load.timescale()
File "/app/.heroku/python/lib/python3.7/site-packages/skyfield/iokit.py", line 270, in timescale
preds = self('deltat.preds')
File "/app/.heroku/python/lib/python3.7/site-packages/skyfield/iokit.py", line 184, in __call__
expiration_date, data = parser(f)
File "/app/.heroku/python/lib/python3.7/site-packages/skyfield/iokit.py", line 347, in parse_deltat_preds
expiration_date = date(year[0] + 2, month[0], 1)
ValueError: year 58668 is out of range