Error 500 after updating iQ Block Country to 1.1.50

Hello,

I just updated the plugin iQ Block Country to version 1.1.50 and I get a 500 error on my website. When I desactivate the plugin everything goes back to normal. I tried to activate it again and resave configuration, also tried to allow frontend to everyone, nothing changed still 500 error

Anyidea ?

Thanks in advance for your help

Cotp