After fresh installation of Magento 2.1.7 and then the theme, when we try to acces Content > Design > Configuration we stumble upon
Something went wrong."
error while loading and then the page loads forever without result.
Theme developers said that is Magento 2 error.
Related to this, we cannot change logo, or mage header setting (like sticky header, etc.)
What can we do?
Can you check on a DEV environment using the Developer mode to see what is failing?
Maybe you can confirm if Magento's logs or the webserver error log has some information.
Oh, ok! Got it!
I set up new website on different domain and at the end i just move it to the desired location.
So the change is overnight.