Elden Rings PC version had a lot of issues till now.
However, thedevelopers have released a patch 1.02.1 that fixes the issue.
This will make the game run smoother even if you have poor performance PC.

How to Fix The Invisible Enemies Glitch?
Mostly this error occurs on less powerful PCs that doesnt meet the RAM requirements.
Let us check out how to fix it?

How to Fix Controller Connection Errors?
There are many players who are reporting about controller connection.
The game is unable to recognize the controller plugged in.

So, verify you use the compatible controller and also check whether Windows is properly recognizing it or not.
For this, open Control Panel » Devices and Printers » PC recognizes your controller.
If the PC doesnt recognize your controller, then have a go at unplug it and plug it back.

The rest of the errors can be solved by updating with the patch fix released by the developers.