Xcode 8 Beta 4 - Comment Shortcut Disabled

Question

I just updated to Xcode 8 Beta 4 and the shortcut cmd + / to comment a line is not working..

In the dropdown menu it\'s disabled:

<

Answer 1

I applied @junjie 's method

sudo /usr/libexec/xpccachectl

It works well on Xcode 8.2.1 (8C1002) only except for specific files.

Then, I found the reason.

/* Comment ... //*/

This type of comment has made it inoperable.

After the line containing above comment type, "Comment Selection" didn't work.

Erase or change them.