Hello @Pbalazs89,
Thanks for writing in!
Could you please update to the latest versions?
Our latest versions are:
- Pro theme
4.2.3
- WordPress
5.7
- PHP
7.4
- The Grid
2.7.9.1
This latest release contains fixes for several issues so be sure to check out the changelog:
After doing the updates, always remember to clear all caches (if you are using WP Rocket, WP SuperCache or W3 Total Cache) when updating so that the code from the latest release is always in use. This will help you to avoid any potential errors.
It could also be caused by a plugin conflict, amongst other things. Please check out this troubleshooting article here and follow the instructions for the following sections (where appropriate):
Testing for Plugin Conflict
Theme Update
CSS/JS Customization
Disabling Cache
Disabling CDN
Please let us know how it goes.