Comment # 4 on bug 988328 from Mario Manno

I tried caffeine 2.8.3 from GNOME:Apps, but 'caffeine-indicator' is still not
starting.

Traceback (most recent call last):
  File "<frozen importlib._bootstrap>", line 890, in _find_spec
AttributeError: 'DynamicImporter' object has no attribute 'find_spec'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/bin/caffeine-indicator", line 30, in <module>
    from gi.repository import GLib, Gtk, GObject, AppIndicator3
  File "/usr/lib64/python3.5/site-packages/gi/importer.py", line 127, in
find_module
    'introspection typelib not found' % namespace)
ImportError: cannot import name AppIndicator3, introspection typelib not found