Nextcloud version: 12.0.0  Operating system and version: unknown, managed webhost  Apache or nginx version: unknown, managed webhost  PHP version: 7.0.22  Is this the first time you’ve seen this error?: yes (not sure when it started…)  Can you reliably replicate it?:  Yes, the error appears on every page load/reload within nextcloud.  The issue you are facing:  On the top-center position, messages and notifications are shown. Usually a text, followed by an “x” to close the message overlay. Right...