# change code of the `core/admin_templates/languages/email_template_list.tpl` - remove `<inp2:m_if check="m_IsDebugMode"> check around `Add` button
# go to {nav User Management > Administrators}
# add standard administrator user by entering only required fields - Password and E-mail
# log into adm.console with non-root administrative user
# switch off debug mode
# go to {nav Website & Content > E-mail Templates}
# press `Add` button
# confirm that happened redirect to the `No Permission` page
# go to {nav Website & Content > E-mail Templates}
# choose some template in the `E-mail Templates ` grid and press `Edit` button
# confirm that opened `Editing E-mail Template` page without any permission errors