Change of address tool couldn’t fetch the page error

We migrated from https://ketabchi.org to https://ketabchi.com.It seems we have done all requirements mentioned here for using search console change of address tool but now it has passed 4 days from our migration and still every time I try to use the change of address tool after pressing ‘VALIDATE & UPDATE’ button, There is validation failed pop up.

The error is:

Couldn’t fetch the page https://ketabchi.org/

Using the inspect url I see no problem with both urls. I also submitted an index request for both versions. All urls are redirected with 301 status code.