Site disappeared from archive.org?

Hi folks,

I converted my old site (hosted on github) to WordPress mid-year 2018. It had been indexed regularly up to the switch to WordPress, but has not been crawled/indexed into archive.org since. I suspect a problem with robots.txt:

Old robots.txt file

User-Agent: *
Allow: /.
Allow: /
Disallow: /oldblog

Current robots.txt file

# Stolen from Yoast page https://yoast.com/robots.txt
User-Agent: *
Disallow: /suggest/?*

Could this be caused by a faulty robots.txt file? Any other effects that could cause this? Many thanks!