Latest version of PHPBB Single Sign On crashes login

Just tried to update PHPBB Single Sign On. Am now unable to login.

Originally updated within dashboard. Got result below.

Have downloaded and FTPd latest revision to overwrite files on server. No change.

Site pages display:

[phpBB Debug] PHP Warning: in file [ROOT]/includes/session.php on line 547: session::include_once([ROOT]/includes/auth/auth_wpbb.php) [function.session-include-once]: failed to open stream: No such file or directory
[phpBB Debug] PHP Warning: in file [ROOT]/includes/session.php on line 547: session::include_once() [function.include]: Failed opening ‘[ROOT]/includes/auth/auth_wpbb.php’ for inclusion (include_path=’.:’)
[phpBB Debug] PHP Warning: in file [ROOT]/includes/session.php on line 1035: Cannot modify header information – headers already sent by (output started at [ROOT]/includes/functions.php:3815)
[phpBB Debug] PHP Warning: in file [ROOT]/includes/session.php on line 1035: Cannot modify header information – headers already sent by (output started at [ROOT]/includes/functions.php:3815)
[phpBB Debug] PHP Warning: in file [ROOT]/includes/session.php on line 1035: Cannot modify header information – headers already sent by (output started at [ROOT]/includes/functions.php:3815)

Login attempt displays:

[phpBB Debug] PHP Warning: in file [ROOT]/includes/session.php on line 547: session::include_once([ROOT]/includes/auth/auth_wpbb.php) [function.session-include-once]: failed to open stream: No such file or directory
[phpBB Debug] PHP Warning: in file [ROOT]/includes/session.php on line 547: session::include_once() [function.include]: Failed opening ‘[ROOT]/includes/auth/auth_wpbb.php’ for inclusion (include_path=’.:’)
[phpBB Debug] PHP Warning: in file [ROOT]/includes/session.php on line 1035: Cannot modify header information – headers already sent by (output started at [ROOT]/includes/functions.php:3815)
[phpBB Debug] PHP Warning: in file [ROOT]/includes/session.php on line 1035: Cannot modify header information – headers already sent by (output started at [ROOT]/includes/functions.php:3815)
[phpBB Debug] PHP Warning: in file [ROOT]/includes/session.php on line 1035: Cannot modify header information – headers already sent by (output started at [ROOT]/includes/functions.php:3815)
[phpBB Debug] PHP Warning: in file /var/www/vhosts/mainstreetforumnc.org/httpdocs/wp-login.php on line 362: Cannot modify header information – headers already sent by (output started at [ROOT]/includes/functions.php:3815)
[phpBB Debug] PHP Warning: in file /var/www/vhosts/mainstreetforumnc.org/httpdocs/wp-login.php on line 374: Cannot modify header information – headers already sent by (output started at [ROOT]/includes/functions.php:3815)
[phpBB Debug] PHP Warning: in file [ROOT]/includes/session.php on line 547: session::include_once([ROOT]/includes/auth/auth_wpbb.php) [function.session-include-once]: failed to open stream: No such file or directory
[phpBB Debug] PHP Warning: in file [ROOT]/includes/session.php on line 547: session::include_once() [function.include]: Failed opening ‘[ROOT]/includes/auth/auth_wpbb.php’ for inclusion (include_path=’.:’)
[phpBB Debug] PHP Warning: in file [ROOT]/includes/session.php on line 1035: Cannot modify header information – headers already sent by (output started at [ROOT]/includes/functions.php:3815)
[phpBB Debug] PHP Warning: in file [ROOT]/includes/session.php on line 1035: Cannot modify header information – headers already sent by (output started at [ROOT]/includes/functions.php:3815)
[phpBB Debug] PHP Warning: in file [ROOT]/includes/session.php on line 1035: Cannot modify header information – headers already sent by (output started at [ROOT]/includes/functions.php:3815)
[phpBB Debug] PHP Warning: in file /var/www/vhosts/mainstreetforumnc.org/httpdocs/wp-includes/pluggable.php on line 680: Cannot modify header information – headers already sent by (output started at [ROOT]/includes/functions.php:3815)
[phpBB Debug] PHP Warning: in file /var/www/vhosts/mainstreetforumnc.org/httpdocs/wp-includes/pluggable.php on line 681: Cannot modify header information – headers already sent by (output started at [ROOT]/includes/functions.php:3815)
[phpBB Debug] PHP Warning: in file /var/www/vhosts/mainstreetforumnc.org/httpdocs/wp-includes/pluggable.php on line 682: Cannot modify header information – headers already sent by (output started at [ROOT]/includes/functions.php:3815)
[phpBB Debug] PHP Warning: in file /var/www/vhosts/mainstreetforumnc.org/httpdocs/wp-includes/pluggable.php on line 881: Cannot modify header information – headers already sent by (output started at [ROOT]/includes/functions.php:3815)

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