Hi @pbucevac, thanks for opening a support topic with us. We are aware of a conflict caused by the Transliterator plugin which I can see from your site source code you are using on your site. There is an open GitHub issue with regards to this specific conflict.
Could you please try and deactivate the Transliterator plugin and confirm that the issue no longer exists?
Yes, I deactivate the Transliterator plugin and now no error is displayed, but I really need that plugin.
@pbucevac Thanks for confirming. Unfortunately there is no workaround other than uninstalling Transliterator when viewing the Site Kit dashboard. While this isn’t what you wish to hear, the plugin is modifying REST responses, including Site Kit responses. It’s also possible that they are modifying other plugin REST endpoint responses.
We are planning to add a notice for such known conflicts, with a guide on the plugin website for additional insights in cases similar to this, for known or expected issues if the the Site Kit responses are modified.
You may wish to report this to the Transliterator support team but we are unfortunately unable to fix this one as it is that plugin that is modifying the REST responses which is causing this error in the Site Kit dashboard.
No problem at all and hope you can find a solution to your issue.