If you update your security settings on LinkedIn such as your email address or password, you will need to reconnect any related LinkedIn Services before LinkedIn allows the posts through as we will no longer have the correct details to enable this.
To resolve this, will need to update relevant LinkedIn services as follows:
1. Go to Services.
2. My Services.
3. Locate the LinkedIn account and then select the Edit icon.
4. Click 'Reconnect to LinkedIn'.
5. Provide the login details for that account.
6. Select 'Update Account'.