In the analysis_options.yaml file, the part

include: package:very_good_analysis/analysis_options.yaml

causes the following error:

Mapping values are not allowed here. Did you miss a colon earlier?dart(parse_error)

The colon is correctly written.

I referred to this question, but it didn’t solve the problem:

https://github.com/dart-lang/sdk/issues/49946
How can I resolve this error?

Switching the Dart and Flutter extensions to the pre-release versions did not resolve the error.