Having issue when try to edit block it gives error
PermalinkI have made a block but when i try to edit the edit part comes but when i try to save it i got the error
Warning: Cannot modify header information - headers already sent by (output started at /home/c7015221/public_html/blocks/block_name/controller.php:1) in /home/c7015221/public_html/updates/concrete5.4.1.1/concrete/startup/process.php on line 464
I checked blocks controller but there is no space in controller also
SO can any one help me in this , is there anything wrong with new concrete version?
Please help me to get out of this

Thanks for your reply, one thing to mention i am getting the error when i save the block means when i edit the edit part comes fine but when i save it , it gives me this issue
I am attaching the zip file
http://www.concrete5.org/documentation/developers/system/packages...
Thanks for your fast reply.
The zip i given is the block not the package so is there any issue in creating block you mean?