"Start" Button missing after completing Gmail upload

[GuzelyaN]

Priority: Medium
Environment:

Browser: Chrome
OS: Windows 11

Steps to Reproduce:

1. Go to https://archive.zk.email/upload_gmail
2. Select a Gmail account and fill in Start/End dates
3. Click Start and complete the process
4. After completion, try changing the dates to submit again

Expected Result:
The Start button should become available so the user can send another request with the updated data

Actual Result:
The Start button is no longer visible.
The user must reload the page to send another request with updated data.