If you’re having persistent issues, make sure you've installed the latest drivers, as suggested in the YouTube How To Update And Download Realtek 802.11 N WLAN tutorial.
sudo ip link set wlan0 up
The RTL8188EU is famous in the Linux community because it is not always included in the mainline Linux kernel. Installing on Debian/Ubuntu/Raspberry Pi If you’re having persistent issues, make sure you've
Encouraged by his success, John decided to share his patched driver with the world. He uploaded it to a popular open-source repository, where it quickly gained traction. Other users with similar issues began to download and use the patched driver, and soon, a community of developers formed around it. If you’re having persistent issues