ErrorException: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in core.php:160

[zerwes]

IMHO php 8.2 related

[zerwes]

for the impatient: a hotfix release can be found at https://github.com/Rosa-Luxemburgstiftung-Berlin/dns-ui/releases/tag/v0.2.7-203-206

[thomas-pike]

Fixed in b17fdbaa.