@Draxzelex
EDIT: At last! I am able to use the forum as intended! I am so happy!
I am now facing another problem. Once entering the hbmenu, the /switch folder appears to be empty (no tinfoil can be found). I am unable to use the tinfoil.bin file inside my /switch folder.
By following the
GitHub link
I was not able to directly locate a nro file. However, I found a website named tinfoil io that had a download section, allowing me to find a nro file.
The error of not being able to use any cartridge games happened right after I installed the "Pokemon Eevee" nsp file from goldleaf. I then removed the item using the following combination from my switch menu:
"+ -> Data Management -> Delete Software"