XenForo InvalidArgumentException: HTTP/1.1 404 Not Found

D

Dkf

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Translation:I have Xenforo version 2.2.13 installed.
The admin panel says there are unfinished tasks.
I click on "Continue" and get the following error.

InvalidArgumentException: ""HTTP/1.1 404 Not Found"" is not valid header name in src/vendor/guzzlehttp/psr7/src/MessageTrait.php at line 230
  1. GuzzleHttp\Psr7\Response->assertHeader() in src/vendor/guzzlehttp/psr7/src/MessageTrait.php at line 147
  2. GuzzleHttp\Psr7\Response->setHeaders()...

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