when trying to upload images, my multiple image upload will not function- it shows the first picture as uploaded, but won't go past this first image-- also pgpluploadtmp folder keeps showing up in the folder I am trying to upload to:

I don't see it in other folders, so not sure why it is there. Also, the multiple image upload previously worked just fine. I hadn't utilized PhocaGallery upload in a couple of months and have tweeked my Joomla extension called Events Booking since last upload- I have no idea if this is causing any problem as I can't seem to see anything wrong, except that I am also getting that notice spoken about by another person concerning:
Trying to get property of non-object in /home/domain/administrator/components/com_phocagallery/libraries/phocagallery/path/route.php on line 22
Thanks for help as I have been trying to figure this out for a while now!