I have the same error
Unable to continue. file_put_contents(): Only 0 of 454 bytes written, possibly out of free disk space in /var/www/html/admin/modules/dahdiconfig/includes/dahdi_cards.class.php on line 1861
#0 [internal function]: Whoops\Run->handleError(2, ‘file_put_conten…’, ‘/var/www/html/a…’, 1861, Array)
#1 /var/www/html/admin/modules/dahdiconfig/includes/dahdi_cards.class.php(1861): file_put_contents(‘/etc/modprobe.d…’, ‘# -------------…’)
#2 /var/www/html/admin/modules/dahdiconfig/functions.inc.php(25): dahdi_cards->write_modprobe()
#3 /var/lib/asterisk/bin/retrieve_conf(586): dahdiconfig_conf->dahdiconfig_conf()
#4 {main}