problem slider does not display images

I wanted to ask if anyone knew how to solve the problem of displaying images in the slider on the home page of the site https://www.bagnoloagricola.comè the site of a non-profit organization which creates exhibitions and events in the town of Bagnolo Piemonte, but while I was trying to finalize the site I noticed that the slider on the home does not display images, slider using jquery and the thumb.php file adds a command to the end of the link of the image (& h = 316 & w = 980), which does not allow the view, I tried to Dere is 755 permissions to the file thumb is to chache folder that is used to save images temporarily but nothing. this and the string created by the slider to display the picture is wrong: https://www.bagnoloagricola.com/wp-content/themes/wisdom/thumb.php?src=https://www.bagnoloagricola.com/wp-content/themes/wisdom/images/banner1.jpg&h=316&w=980

Someone would have some advice to solve this problem. and thanks a lot in advance.