I haven't used the customizer in a while but I'm trying to put the finishing touches on a site and need to change the font size.

Now when I try to edit anything in the customizer when I click save it says:
Unable to write file (/home/bodywo20/public_html/templates/jp-scene/less/style.less).

Here's a screen shot:


Not sure why but I REALLY need to be able to make some changes. I have not changed any file permissions or any such thing. It's just all of a sudden not working.

Any help is greatly appreciated. Thank you.

Make sure all folders are 755 recursively.
Are you using any htaccess file or firewall/securityntype plugins ?