This could be that you do not have an email address linked to your CRM user profile - if this is the case you will need to make sure you have an email address added to your own contact record inside your database.
Your contact record is linked to all your activity and the email address associated to your contact record is where all task emails and calendar event emails are sent to.
You may also have switched off your task emails - please check this by going to the Settings icon and then making sure you have the following selected:
Simply put a check in the 'Email Alerts' check box and change the Task Reminders option to 'True' as shown below:
Click on Update the settings to save this selection.
If after doing both of the above you are still not receiving task emails then please contact our Support Desk as it could be that your email address is blocked which we can investigate and unblock for you.