I am sorry it is not working now but before. I mean suddenly it is happening. I have restored the working state using rescuezilla but not working now. I have tried your command and blacklist the driver but still not working.
I'm sorry, but the image you show doesn't list r-8169 as blacklisted. As long as the 8169 is in use, the 8168 won't be loaded. The only commands i have was to install 8168, which your system already has.
This could be a failing wifi adapter. I'm dealing with the same issue with a Realtek card.
In terminal you had typed: sudo gedit /etc/modprobe.d/blacklist.conf and added "blacklist r8169"? It's a system file and must have admin permissions to edit. Otherwise it gives you an error because it's read only.
hasibul@hasibul-S551LN:~$ uname -a
Linux hasibul-S551LN 5.15.0-73-generic #80~20.04.1-Ubuntu SMP Wed May 17 14:58:14 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
hasibul@hasibul-S551LN:~$
If you reboot and access the grub menu (You may need to tap the esc or the tab key) and move to Advanced options for Zorin - Select an earlier kernel, then boot from it.
Test Wifi.
I suspect it was a system upgrade that introduced the later kernel. This may have had a regression or as @337harvey was aiming toward, maybe due to DKMS.
DKMS is Dynamic Kernel Module Support, which allows supporting a module even if you change the kernel. Without DKMS, upgrading the kernel will mean having to reinstall your drivers for wifi each time.
You can lock in your Current Working Kernel by following the steps here:
The clue was that you had a working wifi driver until a recent update occurred. The -73kernel was included in that.