v. 5.56.7144 doesn't clean IE files. Why?

CCleaner for Windows CCleaner Windows Bug Reporting
1

It winds up skipping MS Edge - Internet Cache, Internet History, Cookies, Download history, Session, Set Aside Tabs, Saved Form Infomation, Saved cards

It winds up skipping MS Internet Explorer v11 - Temporary Internet Files, History, Cookies.

These would be important files to clean. Is there a way to do it?

2

Something is open which uses edge to render, try exiting all other applications and windows apps a try to clean again. Make sure edge isn't set to run in background

Settings > Privacy > Background apps > Scroll down to MS Edge and set to off.