What does one do to proceed with payment when one gets the command "Confirm with assistive touch?" I cannot get it to go ahead and make a payment.

You may have enabled confirm with Assistive Touch instead of the Side button. Please see the pic below which is self-explanatory

It would be better if you can please re-post with a screenshot, in order to understand the phenomenon better. Images/pictures speak louder than words. 

Please understand this is a public forum: While attaching a Screenshot, do not provide any personal credentials, such as IP address, Card detail, email id, apple id, IMEI number, Serial Number, Phone number, Order ID, if you are sharing a map ensure your location is not identifiable, etc.

With the limited information that you have provided, It is hard to even guess the problems faced by you. 

You may get faster and better responses to your query by --> Writing an effective Apple Support Commun… - Apple ...

Please re-post with detail so that someone else can help.

I have this same issue every time I try to buy something from the App Store. It’s already enabled too. So I turn it off and re-enable it and.. still… nothing. Apple ****** me off sometimes.

I’m still not Abel to access the assistive touch after completing the shown settings process

Thank you your a star…..

Thank you for this.

I have assisted touch turned off. When I try to purchase with double tap it tells me my assisted touch is off.