Hi Manish,
If you follow the Travis link, then click on any of the failing builds (such as the job #20260.1 which is the PHP 7.1 build),
You can then look through the build log, which is a massive amount of text output that, after much scrolling, shows this error:
$ ./scripts/generate-mo --quiet po/pa.po:41: 'msgstr' is not a valid PHP format string, unlike 'msgid'. Reason: The character that terminates the directive number 1 is not a valid conversion specifier. msgfmt: found 1 fatal error Error when compiling po/pa.po
The command "./scripts/generate-mo --quiet" exited with 1.
Which is not a file you modified and is an ongoing problem. Even the regular builds (that are testing the main branch) are having this error, so it's not something you've done. The problem is in the main repository, so anything including that file is currently failing.
It's safe to ignore it as part of your pull requests.