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Just do the installation directly via your cpanel rather than uploading unzipped files, this is probably why it fails. My own ini file is specifically:

allow_url_fopen = On
allow_url_include = Off
display_errors = Off
enable_dl = Off
file_uploads = On
max_execution_time = 300
max_input_time = -1
max_input_vars = 5000
memory_limit = 256M
post_max_size = 256M
session.gc_maxlifetime = 1440
session.save_path = "/tmp"
upload_max_filesize = 128M
zlib.output_compression = Off
asp_tags = Off
session.cookie_secure = On

Try that see if you have any luck, and if it works then just edit your own ini to suit.