2.4.2.9. After transfer, interactive elements stopped working on site

If interactive elements (e.g., buttons) stop working after transfer, the most likely cause of this problem may be damage to JavaScript file content during file-by-file download/upload of the site using FTP client with binary mode disabled. This problem is usually accompanied by various errors in the browser console related to JavaScript (e.g., syntax errors).

To fix this, download/upload the site files again, after enabling forced binary mode in your FTP client (instructions: FileZilla, Total Commander). Alternatively, you can download/upload the site files as an archive and extract it using the file manager, which will also prevent the file contents from being corrupted.