Time machine: restore not possible anymore
I have a macbook air from 2015, which does not work anymore, but I have a time machine backup... But it is not possible anymore to restore a time machine backup from SSD to an external HDD since some MacOS version. So I can not access anymore my data. My second macbook does not have enough internal disk space. So what could I do to be able to access my data, to restore it? Is there a fix available? It is like below:
Since time machine does not work anymore, I switch on my other computers to manual backup, but
there was no notice from Apple about this "feature".
MacBook Air, macOS High Sierra (10.13.6)