Magic Mover is not Responding

Hi, 

I’m currently using the Magic Mover: Attachments to Files app in our Salesforce org to convert legacy attachments to Salesforce Files. I'm facing the following issues: 

1. We have 89735 attachments pending migration 

2. When I select even a small batch and click the "Convert" button, the screen just grays out. 

3. There is no error message or progress update, and even after waiting for 15–30 minutes, nothing happens. 

4. I've attached a screenshot for your reference. 

Thanks