cannot select/create location

it worked until some time the last weeks, now it is stalled
it opens the selector/creator window for location, list is selectable but clicking on “save changes” does not have any effect
window needs to be closed by “x” button
all plugins disabled – still same issue

logfile:
[20-Oct-2023 04:57:18 UTC] PHP Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/simple-lightbox/includes/class.utilities.php on line 545
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-includes/functions.php on line 7127
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-includes/functions.php on line 2182
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-includes/functions.php on line 7127
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-includes/functions.php on line 2182
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/eventon-core-functions.php on line 369
[20-Oct-2023 04:57:43 UTC] PHP Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/simple-lightbox/includes/class.utilities.php on line 545
[20-Oct-2023 04:57:51 UTC] PHP Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-includes/functions.php on line 7127
[20-Oct-2023 04:57:51 UTC] PHP Deprecated: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-includes/functions.php on line 2182
[20-Oct-2023 04:57:51 UTC] PHP Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-includes/functions.php on line 7127
[20-Oct-2023 04:57:51 UTC] PHP Deprecated: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-includes/functions.php on line 2182
[20-Oct-2023 04:57:52 UTC] PHP Deprecated: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/eventon-lite/includes/admin/post_types/class-meta_boxes-timedate.php on line 485
[20-Oct-2023 04:57:52 UTC] PHP Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /www/htdocs/w01ac1a7/theussl.de/wp-content/plugins/simple-lightbox/includes/class.utilities.php on line 545

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