Windows 10 Search Blank

with how windows and hardware are much faster nowadays, file search indexing is no longer needed. you can turn that feature off. restart. check if the problem persists.
https://www.online-tech-tips.com/computer-tips/simple-ways-to-increase-your-computers-performace-turn-off-indexing-on-your-local-drives/
 
something mustve corrupted your original account then.
you can try checking if the rest of your windows are working as it should
https://www.howtogeek.com/222532/how-to-repair-corrupted-windows-system-files-with-the-sfc-and-dism-commands/

for now, you can switch to that new account and delete your old one.
glad you figured it out on your own.