Unable to open php file in IDE Project Tree

[dspiegel]

I have a stand alone php file (functions.inc.php) that has various functions in it which is included by a stand alone index.php. Stand alone meaning not part of the Symfony Project but files are part of the project.

I can open the index.php file in PhpStorm IDE, but when I click to open functions.inc.php it does not open.
There seem to be some references to error about oci_connect command.

I have found various errors in idea.log file and they all have common "TypeProvider contract violation" error.

I have attached part of idea.log which shows error after double click on file functions.inc.php.
ToolboxError.txt

Not sure why ToolBox is doing anything with this file.

Is there a setting that needs changed to make it work?

Thanks, Dave