Turns out you used a pagination function in the archive file that is only present after v4.1 – we are on v3.9.
After removing the function, the formatting loads properly and we no longer have any errors showing up in our logs.
Still the same problem here as well – and upon looking at the files, it seems that they still reflect being v1.0.0.
Any chance you have a new version that is accessible from your website? I tried to download there as well, but I get a redirect loop that prevents the download from starting.