This is more as a FYI as I do not see any errors in the application when this message scrolls past in the logs during login
egroupware-nginx | 2021/08/18 10:19:17 [error] 24#24: *6404 FastCGI sent in stderr: "
PHP message: PHP Deprecated: Implicit conversion of keys from strings is deprecated. Please use InMemory or LocalFileReference classes. in /usr/share/egroupware/vendor/lcobucci/jwt/src/Signer/BaseSigner.php on line 57" while reading response header from upstream, client: <reverse proxy IP>, server: _, request: "GET /egroupware/openid/endpoint.php/userinfo? HTTP/1.1", upstream: "fastcgi://172.100.0.2:9000", host: "<FQDN for egroupware host>"
egroupware-nginx | 2021/08/18 10:19:17 [error] 24#24: *6402 FastCGI sent in stderr: "
PHP message: PHP Deprecated: Replicating claims as headers is deprecated and will removed from v4.0. Please manually set the header if you need it replicated. in /usr/share/egroupware/vendor/lcobucci/jwt/src/Builder.php on line 352
PHP message: PHP Deprecated: Using integers for registered date claims is deprecated, please use DateTimeImmutable objects instead. in /usr/share/egroupware/vendor/lcobucci/jwt/src/Builder.php on line 169
PHP message: PHP Deprecated: Using integers for registered date claims is deprecated, please use DateTimeImmutable objects instead. in /usr/share/egroupware/vendor/lcobucci/jwt/src/Builder.php on line 169
PHP message: PHP Deprecated: Using integers for registered date claims is deprecated, please use DateTimeImmutable objects instead. in /usr/share/egroupware/vendor/lcobucci/jwt/src/Builder.php on line 169
PHP message: PHP Deprecated: Not specifying the signer and key to Builder#getToken() is deprecated. Please move the arguments from Builder#sign() to Builder#getToken(). in /usr/share/egroupware/vendor/lcobucci/jwt/src/Builder.php on line 524" while reading response header from upstream, client: <reverse proxy IP>, server: _, request: "GET /egroupware/index.php?cd=yes HTTP/1.1", upstream: "fastcgi://172.100.0.2:9000", host: "<FQDN for egroupware host>", referrer: "https://<FQDN for egroupware host>/egroupware/login.php?cd=1&domain=default"
(I filtered out the IP and hostname of my installation. The IP still showing is the IP the docker-instance is using.)