cannot change the Google analytics code

Standard debugging procedure.

Try changing to WordPress default theme, see if the theme currently in use is the problem.

Try disabling all plugins, see if the problem goes away, enable one at a time to pinpoint the culprit.

Try using Health Check plugin (which can do all the above quickly)
https://www.ads-software.com/plugins/health-check/

Contact hosting provider, I read somewhere that this kind of error could be from server settings.

Hello, deepmill.

Thank you for using our theme; we appreciate it.

Since you use Kale Pro version, and if you don’t resolve it, please open a support thread by going to https://www.lyrathemes.com/support/.

We’re not allowed to provide support for commercial products here.

Kind regards.

thanks – the google code is part of that theme

Just for visibility: The best way to add Analytics code would be https://help.lyrathemes.com/article/212-how-to-add-google-analytics-google-adsense We’re determining next steps on whether it makes sense to remove the field from the upgraded version.