Command failed with exit code 255: hugo (Hugo Netlify) - netlify

Question

Went to deploy my site, it worked fine earlier today, but has now brought up this error. Anyone have any pointers? New to dealing with websites. I use the blogdown package in R and the theme LoveIt. The repository is on Git, and deploys via Netlify.
9:46:35 PM: ────────────────────────────────────────────────────────────────
9:46:35 PM: 1. build.command from netlify.toml
9:46:35 PM: ────────────────────────────────────────────────────────────────
9:46:35 PM: ​
9:46:35 PM: $ hugo
9:46:35 PM: Start building sites …
9:46:35 PM: hugo v0.101.0-466fa43c16709b4483689930a4f9ac8add5c9f66+extended linux/amd64 BuildDate=2022-06-16T07:09:16Z VendorInfo=gohugoio
9:46:35 PM: ERROR 2022/08/22 02:46:35 render of "page" failed: "/opt/build/repo/themes/LoveIt/layouts/posts/single.html:41:33": execute of template failed: template: posts/single.html:41:33: executing "content" at <.Params.categories>: range can't iterate over Research
Error: Error building site: failed to render pages: render of "home" failed: "/opt/build/repo/themes/LoveIt/layouts/index.html:36:20": execute of template failed: template: index.html:36:20: executing "content" at <.Render>: error calling Render: "/opt/build/repo/content/posts/mosquito-activity-and-weather/index.en.md:1:1": failed to execute template _default/summary.html: "/opt/build/repo/themes/LoveIt/layouts/_default/summary.html:41:25": execute of template failed: template: _default/summary.html:41:25: executing "_default/summary.html" at <.Params.categories>: range can't iterate over Research
Total in 236 ms
9:46:35 PM: ​
9:46:35 PM: ────────────────────────────────────────────────────────────────
9:46:35 PM: "build.command" failed
9:46:35 PM: ────────────────────────────────────────────────────────────────
9:46:35 PM: ​
9:46:35 PM: Error message
9:46:35 PM: Command failed with exit code 255: hugo (https://ntl.fyi/exit-code-255)
9:46:35 PM: ​
9:46:35 PM: Error location
9:46:35 PM: In build.command from netlify.toml:
9:46:35 PM: hugo
9:46:35 PM: ​
9:46:35 PM: Resolved config
9:46:35 PM: build:
9:46:35 PM: command: hugo
9:46:35 PM: commandOrigin: config
9:46:35 PM: environment:
9:46:35 PM: - HUGO_VERSION
9:46:35 PM: - NETLIFY_GRAPH_TOKEN
9:46:35 PM: - ONEGRAPH_AUTHLIFY_TOKEN
9:46:35 PM: - HUGO_ENV
9:46:35 PM: publish: /opt/build/repo/public
9:46:35 PM: publishOrigin: config
9:46:36 PM: Caching artifacts
9:46:36 PM: Started saving build plugins
9:46:36 PM: Finished saving build plugins
9:46:36 PM: Started saving pip cache
9:46:36 PM: Finished saving pip cache
9:46:36 PM: Started saving emacs cask dependencies
9:46:36 PM: Finished saving emacs cask dependencies
9:46:36 PM: Started saving maven dependencies
9:46:36 PM: Finished saving maven dependencies
9:46:36 PM: Started saving boot dependencies
9:46:36 PM: Finished saving boot dependencies
9:46:36 PM: Started saving rust rustup cache
9:46:36 PM: Finished saving rust rustup cache
9:46:36 PM: Started saving go dependencies
9:46:36 PM: Finished saving go dependencies
9:46:37 PM: Build failed due to a user error: Build script returned non-zero exit code: 2
9:46:37 PM: Creating deploy upload records
9:46:37 PM: Failing build: Failed to build site
9:46:37 PM: Failed during stage 'building site': Build script returned non-zero exit code: 2 (https://ntl.fyi/exit-code-2)
9:46:37 PM: Finished processing build request in 13.962789296s
In R, when I try to deploy the site locally, I get this error:
Launching the server via the command:
C:/Users/12045/AppData/Roaming/Hugo/0.101.0/hugo.exe server --bind 127.0.0.1 -p 4321 --themesDir themes -t LoveIt -D -F --navigateToChanged
Error: Error building site: failed to render pages: render of "home" failed: "C:\Projects\Website\themes\LoveIt\layouts\index.html:36:20": execute of template failed: template: index.html:36:20: executing "content" at <.Render>: error calling Render: "C:\Projects\Website\content\posts\mosquito-activity-and-weather\index.en.md:1:1": failed to execute template _default/summary.html: "C:\Projects\Website\themes\LoveIt\layouts\_default\summary.html:41:25": execute of template failed: template: _default/summary.html:41:25: executing "_default/summary.html" at <.Params.categories>: range can't iterate over Research
In addition: Warning message:
In if (is.na(c3)) vars = c(vars, HUGO_IGNOREERRORS = "error-remote-getjson") :
the condition has length > 1 and only the first element will be used