with mysql running in a docker-Container.
But requesting a ticket with soapUI failed with the message:
[mantisconnect.php] Error Type: SYSTEM NOTICE,\nError Description: Array to string conversion\nStack Trace:\nnusoap.php L6335 serializeType(<string>'attachments'
After some searching, I found the reason:
I had to install php-soap with:
yum install php-soap.x86_64
after the installation, the SOAP-Request can be executed.