I went to my dashboard to get rid of shortcodes because I had to deactivate a plugin associated with them But I found that I cannot even open my Tempera settings to get rid of them! I have never had this issue before and it needs to be fixed.
This is usually a problem caused by plugin interference that creates a javascript error, making WordPress’ jQuery library (the theme relies on on its settings page) non functional.
I recommend temporarily disabling all your plugins to check if the settings page returns to functional order, then re-enable them back one by one to figure out which one is the culprit.