Illustrator does not open files or create new files; macOS High Sierra 10.13.3
I'm running Illustrator CC 2019 on a MacBook running High Sierra 10.13.3 I cannot open files or create new files at all.
Please accept my sincere apology for the inconvenience. Please get in touch with us at any of the other support channels – https://helpx.adobe.com/support.html . Since this is not a generic issue that we can reproduce at our end, we will need someone to look into your machine to figure out what is going on here.
I found a fix, but it wasn't really a solution. I had backed up my Keyboard Shortcuts and Workspace and added them to 23 after install. I removed them when I was still having the issue, and it seemed to fix the problem
However, it meant that I had to totally rebuild my workspace (which consumes one screen alone) and my keyboard shortcuts. So, not a solution, but it did fix it.
Sorry for the inconvenience caused.
Does quitting and relaunching illustrator solves your problem?
If no, please email me at firstname.lastname@example.org so that we can look into the issue further.
Thanks & regards
This is happening to me now, as well. It started out as a random issue, not with every file. Now it is consistently every file I open or try to create.