Guzzle 7 not supported

[jappiewent]

I think it should work with this.... (in composer.json):

"require": {
"php": "^7.2.5",
"guzzlehttp/guzzle": "7.2.0"
},

[apeschar]

Thanks for your report. This is fixed in version 1.4, which you should be able to install using composer update.

Let me know if this does not resolve the issue.