Error processing coverage reports without any notable changes

Description

Yesterday I made a commit and started waiting for the CI to build. I am using Travis for building the project. It was not as stable as usual that day, so I restarted the build several times and tried to rebuild the project by pushing an empty commit. After some time, it built successfully, but I noticed that Codecov started showing error: There was an error processing coverage reports., without any explanation. After that, all further commits started failing on Codecov. Even when I pushed an empty commit to master branch (the bad commit was in another branch, not in master), i got the same error.

Repository

Additional information

Comparing the errored commit with the previous leads to internal server error (HTTP status 500)

It seems that I managed to fix this by fixing paths. Nevertheless, it’s a regression, because earlier I didn’t perform any path fixing and it worked.