Then, deciding that it was not possible to use the online editing feature, I switched to simply uploading the file and replacing the old one. However, after uploading, cPanel continued to return errors, similar to the one below. I'm not sure what exactly is going on; can anyone explain?
[an error occurred while processing this directive] Upload Status move /home/arbitrar/tmp/cpanel.TMP.a5PnYU4FVkEwzfxs, /home/arbitrar/public_html/test/wp-content/themes/greenish/sidebar.php failed: No such file or directory
sidebar.php (sidebar.php): upload succeeded, overwrote old file.