Hi are you using Longform theme? If so, there is a conflict with the theme and the latest version. Unfortunately this has to be fixed on the theme side. Follow these instructions.
Or to fix it yourself, open functions.php under the Longform theme folder, open functions.php and find this line:
Replace it with this, which is a correct form and Longform theme should be updated
- This reply was modified 4 years, 5 months ago by Hyun Supul.