Permission file error when save options in admin panel

Question

I have a problem with the Magento administrator, when I try to save any changes that are inside

Content > Settings or Content > Blocks

I get the following error and could not correct it.

I already changed the permissions and I do not know what else to do.

find . -type d -exec chmod 755 {} \;
find . -type f -exec chmod 644 {} \;
chmod u+x bin/magento

Additional information

• PHP version 7.0
• Apache 2.2.31
• Magento 2.1.6

Please, what should I do?

Image of error

Answer 1

Be sure that your user have the ownership of the files Use this command to give ownership of the files to your user

chown $USER -R ~/.blabla

Also set the permission 777 for var folder, and test it.