According to your description, you can't access snipping tool or sticky notes., and you can't download these apps from the Microsoft Store. In order to fix this, you can try the following steps:
- Make sure your Windows operating system is updated to the latest version. You can check for updates under "Update & Security" in Settings.
- Try clearing the Microsoft Store's cache. Open Settings, then select Apps and features, find the Microsoft Store and click Advanced options, and then click Reset.
- If the above steps don't resolve the issue, try running the Windows Store App Troubleshooter. You can download and run this tool on the official Microsoft website.
If you're still unable to resolve the issue, please contact your device manufacture for more helps.
Hope it helps.