Inaccessible host after upgrade

Hello,

Before upgrade deploy was working:

Running “serverless” from node_modules
Framework Core: 2.61.0 (local)
Plugin: 5.4.5
SDK: 4.3.0
Components: 3.17.1

Upgraded with:

npm install serverless@^2.72.3

After upgrade getting the following error:

Inaccessible host: cloudformation.ap-southeast-1.api.aws' at port undefined’. This service may not be available in the `ap-southeast-1’ region.

Version now is:

Framework Core: 2.72.3 (local)
Plugin: 5.5.4
SDK: 4.3.2
Components: 3.18.2

Are extra parameters needed in serverless.yml in this new version?