Help with missing links in email

I need help… as you can see in the three photos above, in my workflow I have set up an email reminder to be sent out to people to click on links to watch some videos.

At some point, between when the person scheduling the appointment and them getting the email from Calendly, the hyperlinks are getting lost. Including the ones at the bottom of the email to cancel, reschedule or make changes to the event. I have confirmed that all video links work, both through setup of the workflow and on another browser. But the emails are still being sent as plain text and not as links to the videos. 

I changed the workflow from the email reminder to the email additional resources and got the same results of plain text email with no links to videos.