tag:help.appveyor.com,2012-11-13:/discussions/problems/27457-appveyoryml-suddenly-not-being-read-no-matrix-expansion-msbuild-mode-error-back-despite-build_script-settingAppVeyor: Discussion 2020-08-03T21:03:10Ztag:help.appveyor.com,2012-11-13:Comment/483760552020-06-03T10:29:18Z2020-06-03T10:29:20Zappveyor.yml suddenly not being read; no matrix expansion, "MSBuild" mode error back despite build_script setting<div><p>Poking around the UI, I found some additional things strange. For example, clicking <a href="/"https://developer.github.com/v3/"}"">New build" resulted in an error message about bad github credentials. But restarting older builds did not.</a></p>
<p><a href="/"https://developer.github.com/v3/"}"">Eventually, I deleted the entire project and all its history, then re-created it. This time Appveyor wanted to install an "app" in GitHub, so I let it. It appears things began working after that.</a></p>
<p><a href="/"https://developer.github.com/v3/"}"">Viewing the history of webhook deliveries, a call to the <em>old</em> webhook at 2020-06-01 17:03:32 failed with the error:<br>
```json {D "message": "HTTP GET to https://api.github.com/repos/gevent/gevent/pulls/1635 returned status code 401: Unauthorized\nFull response body:\n{\"message\":\"Bad credentials\",\"documentation_url\</a>; }</p>
<pre>
<code>
The previous call at 2020-06-01 16:18:05 was successful. I have no idea why that error message would have occurred, nor do I know how to fix it other than re-installing and re-authorizing AppVeyor.<br><br>
<br>But the build now seems to be running.</code>
</pre></div>Jason Maddentag:help.appveyor.com,2012-11-13:Comment/483760552020-06-03T17:04:39Z2020-06-03T17:04:39Zappveyor.yml suddenly not being read; no matrix expansion, "MSBuild" mode error back despite build_script setting<div><p>Make sure GitHub is still authorized on "Account -> Authorizations" page.</p></div>Feodor Fitsner