Footer image in the file.htt is not reflecting in the topic even after applying the master page

[SSPL]

My master page, "main.htt," has a footer with a centre-aligned image. But when I apply this layout to the topics, the footer image is not reflected in this topic. Furthermore,  I am unable to figure out a way to apply a master page to multiple topics with a single click.

[Jeff_Coatsworth]

What version of RH are you using & is it all up to date?

[SSPL]

Yes. We just moved to the subscription and install the latest version. So I assume updates are installed. Can you confirm if this option is working for you?

However, I was able to apply the project template to multiple topics in a go. But still, the footer image can't be seen in the topics, even after associating layout file with those topics