function 'validateForm' not found or invalid function name in call_user_func_array()

I have resolved the issue & added patch, please review.

it's good to have a custom name maybe, not sure if there's a problem with having a generic name within a theme itself, the patch just renames the function

the Ajax error you are referring to, need more context, could be a drupal error and not a Radix issue, also depends on your implementation

We are running Radix on a site using Layout builder and getting the same error.
Removing the hook and the function, error goes away.

This is what I think is happening:

• Form loads in front end context (Radix)
• Layout Builder mixes with front end, runs form alter hook from Radix
• Form builds, adds #validate looking for "validateForm" function
• Editor edits
• Edit function called from Layout Builder
• But Layout Builder runs in Admin context
• Ajax Form executes in Admin context
• function does not exist in Admin theme
• error is thrown

Steps to reproduce:

• Install Radix as front end theme
• Enable layout builder
• Create a Custom Block type with an image
• Add inline block to any node with Layout builder
• Add image to block
• Submit change
• Error thrown