If you want to edit your Joomla menu from admin and when you see and error Fatal error: Cannot use object of type stdClass as array …your site path /plugins/system/helix3/helix3.php on line 55
In Joomla if you can’t install any extension and have error with table missing, you need to fix it like this:
After update on Joomla 3.7 if you are using SP Portfolio, you will have some issues like
How to translate elements from SP Page Builder into your language
If you are using SP Page Builder version FREE or PAID, when you want to make update to Joomla 3.8 , after update, you will have white blank page in admin section.
How to fix Joomla error admin An error has occurred 0 Error decoding JSON data: Syntax error Return to Control Panel Open file /libraries/vendor/joomla/registry/src/Format/Json.php and from line 75 to 79 uncomment lines like in image, save and should work