The theme has several issues:

Google maps part of Sierra plugin throwing errors in console

Sierra plugin has references to VERY old Bootstrap version

Sierra plugin throws this error: The REST API is one way WordPress, and other applications, communicate with the server. One example is the block editor screen, which relies on this to display, and save, your posts and pages.

The REST API request failed due to an error.
Error: [] cURL error 28: Operation timed out after 10003 milliseconds with 0 bytes received

Love this post coding needs updating. throws errors.

Compatibility issues if Visual Bakery is extended using any other plugins. Blanks out most new components.  (Example: Ultimate Addons)

Form used in Sierra plugin no longer displays correctly on Chrome, Firefox, etc.