Error Log Warnings

I have installed your program using the installer. I am getting the following errors in the error log.

Warning
09/12/18 15:32:07 array_slice() expects parameter 1 to be array, null given
phpAlbum/main.php (Line:981)
Warning
09/12/18 15:32:07 Invalid argument supplied for foreach()
phpAlbum/main.php (Line:982)
Warning
09/12/18 15:32:08 imageconvolution() expects parameter 1 to be resource, null given
phpAlbum/main.php (Line:276)

I have to say that I love what you've done here. I can see it only getting better.