WIFI Bug? mac OS Mojave 10.14.6

Hey there guys!

Does anybody have the same problem like me and maybe even figured it out somehow how to deal with it?

Some days ago I updated my Mac to 10.14.6 and am facing difficulties with wifi and bluetooth since then.

my mac wont connect to any wifi no longer. I checked the hardware, I tried the analysis of the wifi as well as figuring out if something with the iP-adress is wrong via the terminal, but I simply can‘t connect to any wifi. Not even a mobile hotspot.

furthermore I cant do a data transfer via bluetooth airdrop from a mobile device to my mac. Its just working with 2 macs.

Does anybody know what to do? Im really frustrated at that point.

oh and my girlfriend does have the same mac and didn‘t do the update and everything works.