1. Delete file accounts/default1/themes/merchants/classic_wide/login_form.tpl 2. Delete all files from directory accounts/default1/cache/templates/merchants/classic_wide/Example of corrupted design:
1. Delete file accounts/default1/themes/merchants/classic_wide/login_form.tpl 2. Delete all files from directory accounts/default1/cache/templates/merchants/classic_wide/Example of corrupted design: