Got 'Exit 255' when using nohup command

Question

I'm using the nohup command to execute a php file in my Linux Server, previously this command ran smoothly and I have been using it for years, but lately (until now) I've been getting an Exit 255 after running it. The php script is fine (there is no error).

Here is the command I ran:

nohup php /usr/lib/backhandler/backprc.php > backprc.log &

Here is the reply after ran that command above:

root@mine:/# nohup php /usr/lib/backhandler/backprc.php > backprc.log &
[1] 159713
root@mine:/# nohup: ignoring input and redirecting stderr to stdout
[1]+  Exit 255                nohup php /usr/lib/backhandler/backprc.php > backprc.log

Has anyone experienced this too and managed to solve it?
Any input suggestions will help me, thank you guys.