The Node-Module doesn't work properly with the latest node-red version

[erkenes]

Describe the bug
The Node-Module node-red-contrib-alexa-smart-home doesn't work with the latest Node-Red Version.

To Reproduce
Go to the Pallet Manager and search & install node-red-contrib-alexa-smart-home.

Put the Node alexa smart home v3 into a flow. Add a new Account to the configuration.
Go back to the node and press the reload button to the right of the device list.

Expected behavior
That my devices are loaded into the list.

Log Output

TypeError: RED.warn is not a function
    at /root/.node-red/node_modules/node-red-contrib-alexa-smart-home/alexa.js:997:17
    at Layer.handle [as handle_request] (/root/.nvm/versions/node/v15.5.0/lib/node_modules/node-red/node_modules/express/lib/router/layer.js:95:5)
    at next (/root/.nvm/versions/node/v15.5.0/lib/node_modules/node-red/node_modules/express/lib/router/route.js:137:13)
    at Route.dispatch (/root/.nvm/versions/node/v15.5.0/lib/node_modules/node-red/node_modules/express/lib/router/route.js:112:3)
    at Layer.handle [as handle_request] (/root/.nvm/versions/node/v15.5.0/lib/node_modules/node-red/node_modules/express/lib/router/layer.js:95:5)
    at /root/.nvm/versions/node/v15.5.0/lib/node_modules/node-red/node_modules/express/lib/router/index.js:281:22
    at param (/root/.nvm/versions/node/v15.5.0/lib/node_modules/node-red/node_modules/express/lib/router/index.js:354:14)
    at param (/root/.nvm/versions/node/v15.5.0/lib/node_modules/node-red/node_modules/express/lib/router/index.js:365:14)
    at Function.process_params (/root/.nvm/versions/node/v15.5.0/lib/node_modules/node-red/node_modules/express/lib/router/index.js:410:3)
    at next (/root/.nvm/versions/node/v15.5.0/lib/node_modules/node-red/node_modules/express/lib/router/index.js:275:10)

Environment (please complete the following information):

• Node-RED node version: v1.2.6
• Node-RED version: v15.5.0 (latest LTS)

[erkenes]

I can't find the repository for the Module (the link on the npm page doesn't work) but if I inspect the files in node_modules RED.warn is only in this red marked part:

[erkenes]

Hmm after I added a new Account and refreshed the Device List the error was still there. After a deployment too.

Then I pressed the edit button for the Account first. After that I pressed "save" without a changing something.
At the end I just pressed the refresh button at the device list (without deploying first) and the list was refreshed without an error.

BUT RED.warn() still doesn't work so no warning message is shown.