Coveralls GitHub Action - Error: Lcov file not found

I am configuring Coveralls using a GitHub Action.

I searched but I cannot find how I should be able to generate the ./coverage/lcov.info file.
When the action runs, since I don't have such file, I get:

Using lcov file: ./coverage/lcov.info  
Error: Lcov file not found.

I tried running test with Coverage via IntelliJ but the only export I can produce is in HTML format.

How can I generate the lcov.info file?

Edit - Adding my workflow for reference, as requested in comments

# For most projects, this workflow file will not need changing; you simply need
# to commit it to your repository.
#
# You may wish to alter this file to override the set of languages analyzed,
# or to provide custom queries or build logic.
name: "CodeQL"
on:
push:
branches: [master]
pull_request:
# The branches below must be a subset of the branches above
branches: [master]
schedule:
- cron: '0 14 * * 4'
jobs:
analyze:
name: Analyze
runs-on: ubuntu-latest
strategy:
fail-fast: false
matrix:
# Override automatic language detection by changing the below list
# Supported options are ['csharp', 'cpp', 'go', 'java', 'javascript', 'python']
language: ['java']
# Learn more...
# https://docs.github.com/en/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#overriding-automatic-language-detection
java: [11]
steps:
- name: Checkout repository
uses: actions/checkout@v2
with:
# We must fetch at least the immediate parents so that if this is
# a pull request then we can checkout the head.
fetch-depth: 2
# If this run was triggered by a pull request event, then checkout
# the head of the pull request instead of the merge commit.
- run: git checkout HEAD^2
if: ${{ github.event_name == 'pull_request' }}
- name: Set up Java JDK
uses: actions/setup-java@v1
with:
java-version: ${{ matrix.java }}
# Initializes the CodeQL tools for scanning.
- name: Initialize CodeQL
uses: github/codeql-action/init@v1
with:
languages: ${{ matrix.language }}
# If you wish to specify custom queries, you can do so here or in a config file.
# By default, queries listed here will override any specified in a config file. 
# Prefix the list here with "+" to use these queries and those in the config file.
# queries: ./path/to/local/query, your-org/your-repo/queries@main
# Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
# If this step fails, then you should remove it and run the build manually (see below)
- name: Autobuild
uses: github/codeql-action/autobuild@v1
# ℹ️ Command-line programs to run using the OS shell.
# 📚 https://git.io/JvXDl
# ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
#    and modify them (or add more) to build your code if your project
#    uses a compiled language
#- run: |
#   make bootstrap
#   make release
- name: Perform CodeQL Analysis
uses: github/codeql-action/analyze@v1

I had the same error on GitHub Actions (see this build log), but I had a slightly different GitHub Action workflow.yml (which is maybe a bit more "default" in a Java / Maven setup):

name: build
on: [push]
jobs:
coverage:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2
- uses: actions/setup-java@v1
with:
java-version: 15
- run: mvn -B test -P coverage --no-transfer-progress
- uses: coverallsapp/github-action@master
with:
github-token: ${{ secrets.GITHUB_TOKEN }}

And given the following configuration inside my pom.xml for the jacoco-maven-plugin and coveralls-maven-plugin:

<profiles>
<profile>
<id>coverage</id>
<build>
<plugins>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>${build-plugin.jacoco.version}</version>
<executions>
<!-- Prepares the property pointing to the JaCoCo
runtime agent which is passed as VM argument when Maven the Surefire plugin
is executed. -->
<execution>
<id>pre-unit-test</id>
<goals>
<goal>prepare-agent</goal>
</goals>
</execution>
<!-- Ensures that the code coverage report for
unit tests is created after unit tests have been run. -->
<execution>
<id>post-unit-test</id>
<phase>test</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.eluder.coveralls</groupId>
<artifactId>coveralls-maven-plugin</artifactId>
<version>${build-plugin.coveralls.version}</version>
</plugin>
</plugins>
</build>
</profile>
</profiles>

After some digging into the topic I found this issue of the coverallsapp/github-action which says basically that there's no support for JaCoCo with the Coveralls Action right now.

Therefore I saw no other option than to switch to https://codecov.io and the matching https://github.com/codecov/codecov-action (like the cucumber-jvm Team also did). We can remove the coveralls-maven-plugin from our pom.xml. My workflow.yml now looks like this:

name: build
on: [push]
jobs:
coverage:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2
- uses: actions/setup-java@v1
with:
java-version: 15
- run: mvn -B test -P coverage --no-transfer-progress
- uses: codecov/codecov-action@v1
with:
file: ./**/target/site/jacoco/jacoco.xml
name: codecov

Here's also the a fully comprehensible example project: https://github.com/codecentric/cxf-spring-boot-starter/blob/master/.github/workflows/build.yml where I use codegov successfully now.

The same identical configuration works today, I guess some changes were done on the GitHub side.