Access compensation plans to configure error

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Hello everyone,

Today we are experiencing a weird behavior in our test environment for compensation. We have more than 20 plans in the system and when we are trying to access a plan to configure it we receive the following error/warning message that doesn't allow us to enter the plan:

The weirdest thing is that the behavior is not consistent. There are times that we can enter the plan X but if I go outside and try to reenter plan X, I receive the above message.

Does anyone know what this is and how we can resolve it?