PHP deprecated

[verboEse]

I'm running on Debian stable (12/bookworm) with PHP 8.2, which seems to be not compatible to this module:

2024/07/12 13:04:53 [error] 566#566: *148501 FastCGI sent in stderr: "PHP message: PHP Deprecated:  Return type of Icinga\Module\Azure\restclient\RestClient::current() should either be compatible with Iterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/share/icingaweb2/modules/azure/library/Azure/restclient/RestClient.php on line 76; PHP message: PHP Deprecated:  Return type of Icinga\Module\Azure\restclient\RestClient::next() should either be compatible with Iterator::next(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/share/icingaweb2/modules/azure/library/Azure/restclient/RestClient.php on line 84; PHP message: PHP Deprecated:  Return type of Icinga\Module\Azure\restclient\RestClient::key() should either be compatible with Iterator::key(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/share/icingaweb2/modules/azure/library/Azure/restclient/RestClient.php on line 80; PHP message: PHP Deprecated:  Return type of Icinga\Module\Azure\restclient\RestClient::valid() should either be compatible with Iterator::valid(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/share/icingaweb2/modules/azure/library/Azure/restclient/RestClient.php on line 88; PHP message: PHP Deprecated:  Return type of Icinga\Module\Azure\restclient\RestClient::rewind() should either be compatible with Iterator::rewind(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/share/icingaweb2/modules/azure/library/Azure/restclient/RestClient.php on line 71; PHP message: PHP Deprecated:  Return type of Icinga\Module\Azure\restclient\RestClient::offsetExists($key) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/sh
2024/07/12 13:04:53 [error] 566#566: *148501 upstream sent too big header while reading response header from upstream, client: 127.0.0.1, server: , request: "POST /director/importsource/add HTTP/1.0", upstream: "fastcgi://unix:/run/php/php-fpm.sock:", host: "127.0.0.1:8080", referrer: "https://icinga-prod.mydomain.net/director/importsources"

When trying to create a new importsource, after providing the tenantid and client credentials, the connection to icinga breaks and this message pops in the error log of NGinX.
I assume the code is not yet ready for PHP 8.0+. I'm not sure though if these deprecatione notes also explain the broken connection?!