5 ਤਾਰਿਆਂ ਵਿੱਚ 5 ਮਿਲੇ

One more note, maybe it will help:
If I select the item "Refresh Calendar" to "Manually" in the calendar settings, the synchronization works. If I choose "Every 30 minutes" or "Every 60 minutes", the sync doesn't work.

ਇਹ ਸਮੀਖਿਆ ਐਡ-ਆਨ (102.0.0) ਦੇ ਪਿਛਲੇ ਵਰਜਨ ਲਈ ਹੈ।  This user has a previous review of this add-on.