Xpert Blog gives 500 Error (and their website is gone)

[Stephen-FFC]

The Xpert Blog that came with the them I've just purchased is giving me an Error 500 the moment I try to edit a blog post.
I've seen a post elsewhere that says it has something to do with friendly URLs being on, but I can't turn them off due to some missing ID keywords

Here's that error:

Keyword "{id}" required for route "xipblog-archive-wid-module" (rule: "xipblog/category/{rewrite}.html")

Keyword "{id}" required for route "xipblog-tag-wid-module" (rule: "xipblog/tag/{rewrite}.html")

Keyword "{id}" required for route "xipblog-single-wid-module" (rule: "xipblog/post/{rewrite}.html")

 

On top of this, when I try to configure the module, I get redirected to Xpert's website (xpert-idea.com), which is gone leaving only a spam page offering the domain for sale.

Should I treat this as a bad joke and buy a new blog module, pursue this with the theme developer, or is there a simple fix I can apply?

(I have a second installation that has a different theme running on a different server, but using the same blogging module. It's giving me the same error.)

Edited October 5, 2020 by Stephen-FFC (see edit history)

[Stephen-FFC]

Okay... everyone stop panicing. I've solved the problem.

I downgraded the PHP version from 7.3 to 7.1 and it worked.