Rmarkdown addin for creating new post not working - r-markdown

Question

Today I wanted to create a new post for my website (built using blogdown), but the New Post addin doesn't seem to work.
When I select "New Post" or run
blogdown:::new_post_addin()
I get an error:
Error in FUN(X[[i]], ...) : subscript out of bounds
In addition: Warning messages:
1: In value[[3L]](cond) :
Cannot parse the YAML metadata in 'content/photo.md': Scanner error: while scanning an alias at line 3, column 1 did not find expected alphabetic or numeric character at line 3, column 2
2: In value[[3L]](cond) :
Cannot parse the YAML metadata in 'content/research.md': Scanner error: while scanning an alias at line 4, column 1 did not find expected alphabetic or numeric character at line 4, column 2
I am not sure what the additional warnings are about, but I want to focus on the main error. Here are details returned by traceback():
> traceback()
10: lapply(meta, `[[`, i)
9: unlist(lapply(meta, `[[`, i))
8: blogdown:::collect_yaml()
7: eval(exprs[i], envir)
6: eval(exprs[i], envir)
5: sys.source(pkg_file("scripts", file), envir = new.env(parent = globalenv()),
keep.source = FALSE)
4: xfun::in_dir(site_root(), expr)
3: in_root(sys.source(pkg_file("scripts", file), envir = new.env(parent = globalenv()),
keep.source = FALSE))
2: source_addin("new_post.R")
1: blogdown:::new_post_addin()
Interestingly, when I run this command:
blogdown::new_post(title, ext = '.md')
it works fine and I can create a new post. I updated both blogdown and hugo but to no avail. Could someone help me understand what this error is about? Other addins (such as Insert Image) work fine.
As requested, the githup repo is https://github.com/msmielak/msmielak.github.io and the dput() output is below:
>dput(blogdown:::scan_yaml())
list(`content/about.md` = "<img align=\"right\" src=\"/./about_files/rsz_screenshot_2020-12-28_une_home.png\" alt=\"\" width=\"100px\"/>\n\n**2014-**\nPhD candidate at the School of Environmental and Rural Sciences University of New England in Armidale, Australia.",
`content/code.md` = NULL, `content/contact.md` = NULL, `content/photo.md` = NULL,
`content/post/2021-03-29-extracting-date-and-time-from-photo-using-ocr-engine-tesseract/index.md` = list(
title = "Extracting date and time from camera trap photos using R and tesseract",
author = "", date = "2021-03-29", slug = list(), categories = c("code",
"R"), tags = c("R", "code", "camera trap", "OCR"), description = "",
featured = "", featuredalt = "", featuredpath = "", linktitle = ""),
`content/research.md` = NULL, `content/technology.md` = NULL)
Warning messages:
1: In value[[3L]](cond) :
Cannot parse the YAML metadata in 'content/code.md': Parser error: did not find expected <document start> at line 3, column 67
2: In value[[3L]](cond) :
Cannot parse the YAML metadata in 'content/photo.md': Scanner error: while scanning an alias at line 3, column 1 did not find expected alphabetic or numeric character at line 3, column 2
3: In value[[3L]](cond) :
Cannot parse the YAML metadata in 'content/research.md': Scanner error: while scanning an alias at line 4, column 1 did not find expected alphabetic or numeric character at line 4, column 2

Answer 1

The YAML metadata of the file content/about.md seems to be invalid. Normally YAML metadata should be of the form:
---
tag1: value1
tag2: value2
---
Update: with the dev version of blogdown (>= v1.2.4), the error will no longer occur. What's more, blogdown::check_site() can detect this problem and suggest users fix the problematic YAML metadata.
remotes::install_github('rstudio/blogdown')