No need to regenerate it yourself, image stored in img/tmp/ are regenerated automatically by Prestashop when browsing in Back Office, it's temporary images. If this not work, you have a server configuration issue. Did you checked CHMOD 755 on img/tmp/ ?
Edit History
No need to regenerate yourself, image stored in img/tmp/ are regenerated automatically by Prestashop when browsing in Back Office, it's temporary images. If this not work, you have a server configuration issue. Did you checked CHMOD 755 on img/tmp/ ?
No need to regenerate yourself, image stored in img/tmp/ are regenerated automatically by Prestashop when browsing in Back Office. If this not work, you have a server configuration issue. Did you checked CHMOD 755 on img/tmp/ ?