Update to HTTP2 changed user and groups for files, resulting in non working scripts unless chmod is 777

We just updated, succesfully, from HTTP1.1 to HTTP 2 However we now have the issue that file uploads and scripts needing to wrtie files are no longer working. When I set the particular forlders to CHMOD 777 it works. I did however realize that newly created and uploaded files then have a different user and group. Can anybody giv me a hand on how to resolve this. I assume I need to change the user and group again to be what the folders and files already are. Using Folder permissions of 777 is not going to be a secure choice. They should be wworking fine with 755. The php handler was updated in case it helps. Any help? Thanks a lot!!