After update from 4.7.23 to 4.7.24 Unable to select group, getting an error of No recipients, under Wordpress 4.8.1.

I've read a lot of similar bugs posts with no solutions. I have several mailing groups, I can manage in other places in CiviCRM.

With the update get some exception on my CiviCRM, caused by wrongly set permissions on files and folders (writable by groups).

This can be caused by other wrong permissions?

After update from 4.7.23 to 4.7.24 Unable to select group, getting an error of No recipients, under Wordpress 4.8.1.

My steps: Create new mailing Mailings>New Mailing The new mail opens. Click on Recipients, the dropdown is empty, no groups listed.

This no problem in WP demo site.

I've read a lot of similar bugs posts with no solutions. I have several mailing groups, I can manage in other places in CiviCRM.

With the update get some exception on my CiviCRM, caused by wrongly set permissions on files and folders (writable by groups).

This can be caused by other wrong permissions?