SessionCryptoDriver driver defaults to the recommended driver compiled into APR-util - which is currently missing.

f is NULL in apr_crypto.c on the crash:
APU_DECLARE(apr_status_t) apr_crypto_get_block_key_types(apr_hash_t **types,
const apr_crypto_t *f)
{
return f->provider->get_block_key_types(types, f);
}