Themes GUI not opening

After a day of not using my Lenovo X250 with Linux Mint Cinnamon (up to date) the Themes GUI isn’t opening. It was working fine a few days previously and I even tried restoring a snap shot from 2 and then 3 days ago but it didn’t change anything. This has never happened before and while I’ve been a Mint user for over 2 years, I’m not a knowledgeable or an experienced user when it comes to issues likes this.

I searched on here for answers and did an online search but the issues were not the same as mine.

Thanks in advance for the help.

Hi, this looks like a bug in the desktop setting code that’s linked to the icon or desktop theme you’ve chosen. For now you should be able to reset this with;

gsettings set org.cinnamon.desktop.interface icon-theme 'Mint-Y'

Seems like the bug is “known” and should be fixed in a future release.