now unable to save my new template for Illustrator, error message says, I do not have permission to save in this location, asks me to save elsewhere, but I do not wish to save templates anywhere but the templates folder?

It seems that, you have an issue with saving Adobe Illustrator Templates. However, in order to guide you in the right direction; I will need some more information. Please help me by answering the questions mentioned below.

1. In which location you are saving the Adobe Illustrator Templates?

2. Are you able to save Adobe Illustrator Templates in other location?

Enable the permission and check the issue status.

a. Right click on the folder and click Properties.

b. Click Security Tab, click Edit under Group or User Names and click Add.

c. Type “Everyone” and click check names.

d. Click Ok.

e. Click Full Control under Permissions for everyone.

f. Click Apply and click Ok.

g. Click Ok.