Software error:

Unmatched [ in regex; marked by <-- HERE in m/^(Im Sommer[ <-- HERE )/ at /srv/www/ask23-d8/current/lib/cgi-bin/ask23-suche/ask23-suche1.pl line 686.

For help, please send mail to the webmaster (technik@ask23.de), giving this error message and the time and date of the error.