Given following log snippets, their explanation, and nothing else, explain what failure, if any, occurred during build of this package.

  Snippets are in a format of [X] : [Y], where [X] is a log snippet, and [Y] is the explanation.

  Snippets are delimited with '================'.

  Drawing on information from all snippets, provide a concise explanation of the issue and recommend a solution.

  Explanation of the issue, and recommended solution, should take a handful of sentences.

  Snippets:

  [Error: YAML Exception reading /home/travis/build/faktaoklimatu/web-cz/web-core/collections/_studies/2023-reserse-vodik.md: (<unknown>): did not find expected key while parsing a block mapping at line 28 column 7]: [It shows the YAML error in the file "web-core/collections/_studies/2023-reserse-vodik.md" at line 28, column 7.]

Issue: The file "web-core/collections/_studies/2023-reserse-vodik.md" has invalid YAML syntax, a key was expected at line 28, column 7.
Resolution: Fix the YAML syntax in the file "web-core/collections/_studies/2023-reserse-vodik.md".