Mac Sierra Searching For Wifi

My passport for mac refurbished. Hello, Mac OS X Sierra 10.12.6. My brand new MacBook Pro is not connecting to my home wifi network. I have had this network for years with numerous devices, and currently with two other Apple devices. But as is the case with each Mac operating system update, some users will painfully encounter a slew of problems/issues, like download error, Mac compatibility issue, macOS Sierra upgrade failed, install stuck, slow Mac performance etc. This list of macOS Sierra problems and solutions will show you how to fix the most common problems with MacBook, iMac and other Apple computers after uploading to the new OS.

Set up harmony remote for kodi on a mac mini. I have a MacBook Pro (Retina, 13-inch, Mid 2014) with MacOS Sierra. My issue is that the WiFi keeps searching indefinitely, even when I'm stably connected to my home network. My house is quite isolated so my hotspot is the only one in range. In addition the icons don't reflect the actual signal strength (when choosing the network), and the one in the top bar is constantly animated as if during the connection phase.

I have no idea how to solve this. What can I do? EDIT: this is specific to this device, all the other devices I own have no issues connecting. Also I want to specify that connection is not the issue, meaning that I can browse internet just fine and even use ssh as if nothing was wrong. WiFi Diagnostic tool highlights no issues with the connection (as expected as I'm not seeing any). I performed all the operations listed in the Apple support page, which frankly seem supremely useless, and nothing changed.