Properties panel is blank Adobe Illustrator CC 23.0.1 (64 Bit)

Gigabot, thank you!

Uninstall then Reinstall Illustrator in the creative cloud app. Make sure you don't keep any preference data. This worked for me

This is strange, but I wanted to share in case it helps. When I had this problem, I first did an update that had been waiting for me to take care of, and then did a computer shutdown, aand when that didn't bring the panels back, I was about to try resetting all my preferencess, but first, on impulse, I clicked on the Libraries panel, and when I clicked back to Layers and Properties, they were there.

I am working on the CC 27.2 and I tried resetting all my preferences again and again and nothing worked. BUT I did click on the microscope inside of Illustartor (Discover) and typed in Properties panel and clicked on the first option "Properties Panel" and voila! The Properties panel is back and activated.

Good luck!

Try deleting your Illustrator preferences.

To do so:

For Macintosh Users: The User Library folder in which Illustrator’s preferences are stored is hidden by default on most Macintoshes. To access it make sure that Illustrator is closed and click on the desktop to launch a Finder Window (Command-N).With this window in column view follow the path User>Home folder (it’s the folder with an icon that looks like a house—it may have the user’s name rather than “Home”) and click on the Home folder. With the Option Key pressed choose Library from the Finder Go Menu. “Library” will now appear within the Home folder. Within the Library folder find the folder called Preferences and within it find the folder called “Adobe Illustrator <Version #> Settings” (earlier versions of Illustrator might just say “Adobe Illustrator”) and the file called “com.adobe.Illustrator.plist” and delete both that folder and that file. When Illustrator is next launched it will create new preference files and the program will be restored to its defaults.

For Windows Users: You can try the quick way of resetting on a PC which is to hold down Ctrl + Alt + Shift when launching Illustrator and respond affirmatively when asked if you want to reset. There have been some recent reports that the window asking if you want to reset is not popping up but that the prefs are being reset anyway. If this works great but if it doesn’t you may have to manually delete them.

To do so:

On Windows 7 and above the preference files are hidden. To find them go to the Control Panel and open Folder Options and then click the View tab. Then select “Show hidden files and folders” or “Show hidden files, folders or drive options” in Advanced Settings. Then delete (or rename) the folder at the end of this path: C:\Users\[User Name]\AppData\Roaming\Adobe\Adobe Illustrator [version number]\ Settings\<Language>. Make sure that Illustrator is closed when you do this. When you relaunch the program it will create  new preference files and the program will be at its default settings.

The advantage of manually deleting preference files is that after you’ve reset up the program (make sure that no document window is open) to your liking, you can create copies of your personalized “mint” preference files (make sure that you quit the program before copying them—that finalizes your customization) and use them in the future to replace any corrupt versions you may need to delete.

If that does not work then try deleting your OOBE files.

To do so:

For Macintosh Users: The User Library folder in which Illustrator’s OOBE files are stored is hidden by default on most Macintoshes. To access it make sure that Illustrator is closed and click on the desktop to launch a Finder Window (Command-N).With this window in column view follow the path User>Home folder (it’s the folder with an icon that looks like a house—it may have the user’s name rather than “Home”) and click on the Home folder. With the Option Key pressed choose Library from the Finder Go Menu. “Library” will now appear within the Home folder. Within the Library folder delete the file at the end of this path: Application Support\Adobe\OOBE\opm.db. 

For Windows Users: On Windows 7 and above these files are hidden. To find them go to the Control Panel and open Folder Options and then click the View tab. Then select “Show hidden files and folders” or “Show hidden files, folders or drive options” in Advanced Settings. Then delete (or rename) the folder at the end of this path: C:\Users\[User Name]\AppData\Local\Adobe\OOBE.\opm.db.

After deleting this file you will have to sign in again to your Creative Cloud account.

[moved from Adobe Creative Cloud to Illustrator]