Sorry for the late reply.
I can now edit it by changing the setting of the firewall.
Thank you very much!!!!
Thank you for responding.
The reason why the template could not be uploaded was because the upload limit was set. I changed the setting that was 8 MB maximum to 20 MB.
However, after changing the upload limit, I uploaded the template again, but again the same symptoms will occur.
Of course. Thank you very much. I will share it.
Thank you.
I tried two methods, but it did not solve it.