Alternatively, a fantasy where Katerina is a traveler in a multiverse, using her website as a portal. The "walk with me" is a way to guide someone through different realms to fix a rift.
Alternatively, it could be a mystery where Katerina is missing, and the website is a clue. The user has to "walk with me in fixed" to solve a puzzle or uncover a disappearance. The date might be the last known date she was active.
Let me choose a blend of tech and fantasy. Maybe the website is a gateway to a digital realm, and the user is invited on a quest to repair it. The date is the starting point of the adventure. "Fixed" refers to stabilizing the realm through their shared walk.