extenion upload error,need help

using opencart 2.1.0.1,when upload extension get below error code,already configure ftp,anyone can help me?

my extension file is option-priceupdate.ocmod.zip

SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data

OK

<b>Warning</b>: mkdir(): No such file or directory in <b>/home/u189873305/public_html/admin/controller/extension/installer.php</b> on line <b>82</b><b>Warning</b>: move_uploaded_file(/home/u189873305/public_html/system/upload/temp-qgcjOepFtTvn71QZtNLsgGvAhnQ0DxEg/upload.zip): failed to open stream: No such file or directory in <b>/home/u189873305/public_html/admin/controller/extension/installer.php</b> on line <b>117</b><b>Warning</b>: move_uploaded_file(): Unable to move '/tmp/phprkrMxD' to '/home/u189873305/public_html/system/upload/temp-qgcjOepFtTvn71QZtNLsgGvAhnQ0DxEg/upload.zip' in <b>/home/u189873305/public_html/admin/controller/extension/installer.php</b> on line <b>117</b>{"step":[],"overwrite":[],"error":"File could not be found!"}

Try to install extensions by upload
read my reply for details
http://forum.opencart.com/viewtopic.php?f=190&t=156341