Auto Update Key validation not working for Bulky plugin

Dear VillaTheme Support Team,
I am writing to request assistance with the activation of my purchased plugins. I recently bought two of your products: WooCommerce Orders Tracking and Bulky – Bulk Edit Products for WooCommerce.
While the Orders Tracking plugin activated successfully, I am having trouble with the Bulky plugin on my site (bububrick.com).
The issue is as follows:
I have entered the correct Auto Update Key: ea……9a0.
After clicking the “Save & Check” button, the page does not display any validation message or success notification, even though the key is saved in the input field.
I have already tried both troubleshooting methods provided in your documentation, but neither resolved the issue.
Looking forward to your support.
Best regards,
2bubricks