Hi @sniperka,
Thanks for reaching us,
Our intention behind the update was to incorporate the latest technology and enhance compatibility with other resources. However, we acknowledge that it has affected the customization of your site. If you have not customized the theme and relied on the default features, you would greatly benefit from the update.
For default layout loading issues, we recommend you check this documentation https://docs.themegrill.com/colormag/docs/troubleshooting-common-issues-after-colormag-v3-0-pro-v4-0-updates.
Also, you will need to restore your few settings and layout. So, we recommend you check our new settings and configure them according to your needs. Please check this documentation https://docs.themegrill.com/colormag/new-colormag-documentation/ and check the customizer settings.
Let me know if this helps you or not and I will get back to you.
Regards