Microsoft store help

You could try
Re-register Microsoft Store app in Windows 10
and
Reinstall and Re-register Apps in Windows 10

For future reference: again and again disk imaging is recommended here to users. E.g. Macrium Reflect (free).
If you have a recent disk image (a compressed copy of the used part of partition(s) or disk(s) ) you can restore Windows or any imaged partition or disk to a previous good working state relatively quickly and without technical help.

So if you make a mistake, you can go back to where you were.

It's also a full backup, and invaluable if your disk becomes unusable or your PC unbootable.

Thank you for your reply.

Please do an in-place upgrade repair install which keeps all programs and data and most settings.
For that you will need an iso of the same base build as you have.
Tutorial available in - yes- the Tutorial section.

You can search for these:
Current iso-
Microsoft Media Creation tool
Older builds:
Heidoc iso downloader
Important hint- start this having logged in as normal.

Why aren't you using disk imaging to protect yourself against elementary mistakes and allow you to recover quickly without technical help in many cases- even if your disk should fail?

E.g. Macrium Reflect (free) + external storage. So often recommended here.