Some plugins require the /wp-content/ folder be made writeable, but in such cases they will let you know during installation. In some cases, this may require assigning 755 permissions. If you are on the shared hosting they always uses the “suexec” and above case will not apply for them. If your hosting use the “suexec” approach for running PHP binaries which is a popular approach used by many web hosts
In such cases an “suexec” configuration, the correct permissions scheme is simple to understand.
- All directories should be 755 or 750.
- All files should be 644 or 640. Exception: wp-config.php should be
440 or 400 to prevent other users on the server from reading it. - No directories should ever be given 777, even upload directories.
Since the php process is running as the owner of the files, it gets
the owners permissions and can write to even a 755 directory.
Use FTP and and connect to your hosting and Update the Files permissions as mentioned in https://codex.wordpress.org/Changing_File_Permissions
Follow this guide it’s very simple to follow. I had the same problem and as i follow the guide it actually solved my problem.