Error: pandoc document conversion failed with error 61

[DCEW]

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1. posterdown_betterport

2)Windows 10 x64, R version 4.2.2 (2022-10-31 ucrt), RStudio Version 1.3.959

3. CRAN

4. I'm attempting to knit the default-populated Rmarkdown using posterdown where all I have altered is the title, author and output ("posterdown::posterdown_betterport"). I can knit regular Rmarkdowns as usual, into the same directory. The full error is:

Could not fetch https://use.fontawesome.com/releases/v5.8.1/webfonts/fa-brands-400.woff HttpExceptionRequest Request { host = "use.fontawesome.com" port = 443 secure = True requestHeaders = [] path = "/releases/v5.8.1/webfonts/fa-brands-400.woff" queryString = "" method = "GET" proxy = Nothing rawBody = False redirectCount = 10 responseTimeout = ResponseTimeoutDefault requestVersion = HTTP/1.1 } (InternalException (HandshakeFailed (Error_Protocol ("certificate rejected: [InvalidSignature SignatureInvalid]",True,CertificateUnknown)))) Error: pandoc document conversion failed with error 61 Execution halted

I have tried updating all packages, including {xfun}.