wp-admin ERROR

  • Hello,

    Thanks for your work on the plugin.
    But unfortunately, when I want to change settings I get this errors below (I use WP Version 5.2.2 – Is it no compatible?):

    Warning: Invalid argument supplied for foreach() in /homepages/xx/xxxxxxxxxxxx/htdocs/theme/wp-content/plugins/offen/Helpers/DayHelper.php on line 137

    Warning: Cannot modify header information – headers already sent by (output started at /homepages/xx/xxxxxxxxxxxx/htdocs/theme/wp-content/plugins/offen/Helpers/DayHelper.php:137) in /homepages/4xx5/xxxxxxxxxxxx/htdocs/museumskueche/wp-includes/pluggable.php on line 1251

    Warning: Cannot modify header information – headers already sent by (output started at /homepages/x/xxxxxxxxxxxx/htdocs/theme/wp-content/plugins/offen/Helpers/DayHelper.php:137) in /homepages/xx/xxxxxxxxxxxx/htdocs/teme/wp-includes/pluggable.php on line 1254

    Thanks for helping
    Jutta

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