When subscription created under reseller using non-english language or after you have created a new locale or customised existing one. The following error appears in Plesk GUI:
If use English locale then no errors appear in GUI.
.php file is saved in UTF-8 format with the UTF-8 BOM (Byte Order Mark) as the first three bytes of the file (EF BB BF), PHP doesn't ignore these bytes when loading and compiling the file. But instead considers them output coming prior to the
Remove BOM (Byte Order Mark) from Plesk locale files
# for i in ` grep -rl $'\\xEF\\xBB\\xBF' /usr/local/psa/admin/smb/`;do sed -i '1 s/^\\xef\\xbb\\xbf//' $i;