If your guild defeated bosses but you did not receive Guild Raid reward credits, this usually means the participation requirement was not met.
In order to maintain eligibility for guild rewards, you must battle a boss (or throw a bomb) at least once every 72 hours.
Important details:
This 72-hour timer resets when you join a new guild.
Eligibility is restored as soon as you participate again.
Rewards granted while you were inactive are not awarded retroactively.
You can review this information at any time on the Guild Raid page by tapping the information button. Here's how to find it: