Whenever the connection to a Social Account is lost, Reauthorization will be required in order to reconnect to this account
Navigate to Settings > Connected Apps:

Once you are there, you can click on Reauthenticate:

From there, you can proceed normally to re-authorize all the social accounts per network, i.e. all LinkedIn Pages through the LinkedIn Profile.
Re-authenticating an account from Connected Apps will automatically re-authenticate all the social accounts connected to it. For example, when you re-authenticate a Facebook Profile, then all the Pages and Groups managed by this profile will be re-authenticated as well.
If your profile is Revoked, it will also revoke/remove all the accounts connected to it. This will cause the loss of all posts in the scheduling queue, analytics, and other data for the accounts.
Navigate to Settings > Connected Apps:

Once you are there, you can click on Reauthenticate:

From there, you can proceed normally to re-authorize all the social accounts per network, i.e. all LinkedIn Pages through the LinkedIn Profile.
Re-authenticating an account from Connected Apps will automatically re-authenticate all the social accounts connected to it. For example, when you re-authenticate a Facebook Profile, then all the Pages and Groups managed by this profile will be re-authenticated as well.
If your profile is Revoked, it will also revoke/remove all the accounts connected to it. This will cause the loss of all posts in the scheduling queue, analytics, and other data for the accounts.
Updated on: 12 / 07 / 2022