Since a few hours COL Reminder is crashing if you want to edit a reminder or create a new one.
This is a problem from Google's side and they working on it.
Here are some updates directly from Google.
Update with a hot fix for the problem with Google is rolling out.
Hopefully Google get this fixed soon and I can remove the fix.
Let me know if it is still crashing after the last update.
Could take a few hours until it hits your device.
Update from Google:
Google finally fixed the problem: