I am really sorry for the inconvenience caused by my silly mistake.
When deploying the plugin the freemius SDK removed the premium plugin file but the file reference was still there that causing this major issue.
It was my fault not to test it immediately after deployment.
I have released the updated plugin version 4.8 containing the fix.
I apologize to you for all the trouble that you faced.
@senator54 Thank you so much for your kind words and for updating the review.