Temporary failure while installing PHP packages

The upstream repository hosting the PHP packages has currently an expired certificate. New installations, updates, and restorations of applications relying on PHP will most probably fail with the following error: <package> has no installation candidate. There is no workaround possible for this, you have to wait for the certificate to be renewed. You can monitor the upstream issue but, please, no brigading over there: it’s January 1st, have a little patience. 😅