hmm strange, I used the following format and it works for me. I also tested having “Washington, DC” in the data in case it was a parsing error. But it works.
Do you have any errors in your console? What version of Obsidian (including installer version)?
What is the root of your vault? If it is “Periodic”, it should work as far as I can tell. If it is “Primary”, I think your path should be source: Periodic/countries.csv. It shouldn’t be relative to your note. It should be relative to your vault, with no root slash /
(I had to put spaces in between my closing 3 backticks just so they would render in this forum.)
```csvtable
source: attachments/test.csv
` ` `
Or if I move the csv to the root of my vault, it still works too
```csvtable
source: test.csv
` ` `
Markdow-style links also seem to work for me.
```csvtable
source: [[test.csv]]
` ` `