It appears your work laptop requires https/ssl when accessing websites online, and you dont have it setup (or its not setup correctly).
It’s not a good idea to just port forward port 8123 and have your connection to Home Assistant be unsecured anyway.
You can either subscribe to the nabu casa service to configure secure temote access
Or you can configure a reverse proxy, like the nginx addon, so you can access Home Assistant remotely, securely, and without needing to specify the port in your url