Error Report: Problem loading some websites

Hi,
few things to try,
after each step, restart your browser and then try those sites again.

1. disable tracking prevention edge://settings/privacy

2. clear your browser data from here: edge://settings/clearBrowserData
set time range to "all time"

3. disable your extensions: edge://extensions/

4. reset Edge insider settings: edge://settings/reset

5. reset flags: edge://flags/

6. ultimately, uninstall your Edge dev (choose delete user data during uninstall) and reinstall it again. prior to that, make sure you have enabled sync so that you won't lose any data.
https://www.microsoftedgeinsider.com/en-us/download/