Fatal Error if credentials missing or wrong

[freesh]

Package version: 3.1.3
Neos Version: 8.0.4

If my credentials are wrong i get a fatal error:

PHP Fatal error: Uncaught TypeError: Cannot access offset of type string on string in /...../Data/Temporary/Development/SubContextDocker/Cache/Code/Flow_Object_Classes/KaufmannDigital_CleverReach_Domain_Service_CleverReachApiService.php:371

I think this Line:
$errorMessage = isset($decodedResponse['error']) ? $decodedResponse['error']['message'] : 'No error message given';

should be:
$errorMessage = isset($decodedResponse['error']) ? $decodedResponse['error'] : 'No error message given';