If you are unable to propose a specific worker there are a few things to check:
Is the worker compliant?
Is the worker approved for the type of shift you want to propose for them ? (a carer cannot work a nurse shift for example).
If the worker is not yet marked compliant you will not be able to propose them for the shift on the platform.
If you are trying to propose a worker who is only approved as a carer they will not be able to work a nurse shift or a nurse will be unable to work a carer shift unless they have the worker type activated.
We do this to ensure that anyone who works a shift has all the required documentation and is skilled to work the shift they proposed for.
See how to request a change of worker type here