Reloading Octoprint on laptop

What is the problem? I recently lost the Octoprint program on my laptop after trying to fix a couple of other problem programs. How do I recover/reload Octoprint on my laptop? The program is still active on my Pi and the wi-fi connection is still active because I can operate the printer from my phone. But i cannot use the laptop to operate the printer and it appears that the program is no longer available.

What did you already try to solve it?

Additional information about your setup (OctoPrint version, OctoPi version, printer, firmware, octoprint.log, serial.log or output on terminal tab, ...)

Since Octoprint is running on a Pi that can be accessed from your phone I'd assume you can access it from your browser on your laptop. What did you have on your laptop that you lost?