blocked calendar dates

[Brynn25]

I cannot change availability on my listing to make future dates available. There is an icon with a circle and a line through it when I attempt to click on a calendar date

[Bettye6]

That’s a first for me. Is this on you phone, pad or computer? Do you use another platform like VRBO? 
if your connected to 2 devices, delete the app from your phone (ignore the you will loose all your information) then reload. 
I had a glitch & support told me to do above & it was fixed. 

Someone else might come in who has had this problem. 
Good luck,

Bettye6