Currently, system-level surveys are surveys. However, at the participant level, they may take the form of: registration for training (quotas), quiz (grades) or simply a survey, etc.

From the admin panel, it is reasonable to use the word survey. However, from the participant's perspective, this word misleads him when, for example, he signs up for a training.

Therefore, the question arises whether the messages should not be generalized?
E.g. "We are sorry but you are not allowed to enter this survey." it would be better to say "We are sorry but you don't have permission to access this page".