Senior staff at Co-op say there is a problem. They think there is a 'toxic' culture at work.
This problem is at a high level in the company. People talk about this in the news now.
The problem is big because it makes people feel bad. It is important to have a good place to work.
If the feeling at work is negative, people might leave. This is not good for Co-op.
It is important to fix the problem. When people feel safe, they work better.