Check permissions wp-content directory under the web directory,
# Ls -l
drwxr-xr-x 5 nobody 65534 4096 Feb 3 2016 wp-content
Modify wp-content directory permissions on OK.
chmod -R a+w wp-content
Check permissions wp-content directory under the web directory,
# Ls -l
drwxr-xr-x 5 nobody 65534 4096 Feb 3 2016 wp-content
Modify wp-content directory permissions on OK.
chmod -R a+w wp-content