Cannot duplicate or create a campaign

📦 Install & Upgrade Help
1

Successfully created and used multiple campaigns in 7.2.2. Upgraded to 7.5.5, past campaigns and components are there, all other features and data have integrity but now cannot duplicate or create a campaign.
Start = (tomorrow), End = (2 days from now), Type = email, Status = active, but after pushing Save the screen blanks and URL becomes http://(local IP)/SuiteCRM/index.php. Hitting Enter returns to dashboard and no new campaign. Enabled the log to capture errors and this is the first related message:

Wed Jan 11 16:09:48 2017 [4717][1e48ace2-faf1-738e-45b3-5575b14f1ad4][ERROR] Unable to load custom logic file: custom/include/social/hooks.php .
This message appeared 17 times over 7 minutes after the single attempt to duplicate an existing campaign.

Here is the actual path to the directory indicated that does not hold any ‘hooks’: /var/www/html/SuiteCRM/custom/include/social/ .

Thanks in advance for any directions.

2

The campaign problem was resolved by an upgrade but the error message remains. Conclusion was that they were two different problems; has been resumed in a new topic created Jan 29/17: ‘Unable to load custom logic file:’