Can't mark workouts or days complete

Hey everyone!

After finishing my workout yesterday I went into my calendar to mark it complete only to find that I can no longer mark workouts or days complete. The button is simply missing. I've added a screenshot of a day I had marked complete as a rest day - no buttons whatsoever. This only happens when I'm using Chrome, everything is working just fine with Firefox.

Is anyone having the same issue? Maybe the IT team could take a look at this, that would be great!

Edit: Quick addition - the notes section under each day is missing as well.