[serendipity_event_usergallery] Error message when clicking image

[yellowled]

Installed said plugin for testing #686 (current master, php7.3). Clicking an image in the gallery gives me:

Fatal error: Uncaught ErrorException: Notice: The each() function is deprecated. This message will be suppressed on further calls in /var/www/html/plugins/serendipity_event_usergallery/serendipity_event_usergallery.php:1031 Stack trace: #0 [internal function]: errorToExceptionHandler(8192, 'The each() func...', '/var/www/html/p...', 1031, Array) #1 /var/www/html/plugins/serendipity_event_usergallery/serendipity_event_usergallery.php(1031): each(Array) #2 /var/www/html/plugins/serendipity_event_usergallery/serendipity_event_usergallery.php(451): serendipity_event_usergallery->displayImage('1', 'i.name', 'ASC') #3 /var/www/html/plugins/serendipity_event_usergallery/serendipity_event_usergallery.php(734): serendipity_event_usergallery->show() #4 /var/www/html/include/plugin_api.inc.php(1190): serendipity_event_usergallery->event_hook('entries_header', Object(serendipity_property_bag), Array, '') #5 /var/www/html/include/functions_smarty.inc.php(565): serendipity_plugin_api::hook_event('entries_header', Array, '') #6 /var/www in /var/www/html/plugins/serendipity_event_usergallery/serendipity_event_usergallery.php on line 1031
== ERROR-REPORT (BETA/ALPHA-BUILDS) ==
Fatal Error: Uncaught ErrorException: Notice: The each() function is deprecated. This message will be suppressed on further calls in /var/www/html/plugins/serendipity_event_usergallery/serendipity_event_usergallery.php:1031 Stack trace: #0 [internal function]: errorToExceptionHandler(8192, 'The each() func...', '/var/www/html/p...', 1031, Array) #1 /var/www/html/plugins/serendipity_event_usergallery/serendipity_event_usergallery.php(1031): each(Array) #2 /var/www/html/plugins/serendipity_event_usergallery/serendipity_event_usergallery.php(451): serendipity_event_usergallery->displayImage('1', 'i.name', 'ASC') #3 /var/www/html/plugins/serendipity_event_usergallery/serendipity_event_usergallery.php(734): serendipity_event_usergallery->show() #4 /var/www/html/include/plugin_api.inc.php(1190): serendipity_event_usergallery->event_hook('entries_header', Object(serendipity_property_bag), Array, '') #5 /var/www/html/include/functions_smarty.inc.php(565): serendipity_plugin_api::hook_event('entries_header', Array, '') #6 /var/www in /var/www/html/plugins/serendipity_event_usergallery/serendipity_event_usergallery.php on line 1031.
For more details set $serendipity['production'] = 'debug' in serendipity_config_local.inc.php to receive a stack-trace.

Fatal error: Uncaught ErrorException: Fatal Error: Uncaught ErrorException: Notice: The each() function is deprecated. This message will be suppressed on further calls in /var/www/html/plugins/serendipity_event_usergallery/serendipity_event_usergallery.php:1031
Stack trace:
#0 [internal function]: errorToExceptionHandler(8192, 'The each() func...', '/var/www/html/p...', 1031, Array)
#1 /var/www/html/plugins/serendipity_event_usergallery/serendipity_event_usergallery.php(1031): each(Array)
#2 /var/www/html/plugins/serendipity_event_usergallery/serendipity_event_usergallery.php(451): serendipity_event_usergallery->displayImage('1', 'i.name', 'ASC')
#3 /var/www/html/plugins/serendipity_event_usergallery/serendipity_event_usergallery.php(734): serendipity_event_usergallery->show()
#4 /var/www/html/include/plugin_api.inc.php(1190): serendipity_event_usergallery->event_hook('entries_header', Object(serendipity_property_bag), Array, '')
#5 /var/www/html/include/functions_smarty.inc.php(565): serendipity_plugin_api::hook_event('e in /var/www/html/plugins/serendipity_event_usergallery/serendipity_event_usergallery.php on line 1031