Serverless deploy fails: TypeError: region.toLowerCase is not a function

[chanan]

When running serverless deploy, the deploy fails with the error: TypeError: region.toLowerCase is not a function

serverless.yml

service: deploy-nxt

provider:
  name: aws

plugins:
  - fullstack-serverless

custom:
  fullstack:
    bucketName: devops-dashboard
    distributionFolder: build
    errorDocument: index.html
    singlePageApp: true
    priceClass: PriceClass_100
    domain: my-domain.com
    certificate: arn:...

output

serverless deploy -verbose
Serverless: Load command interactiveCli
Serverless: Load command config
Serverless: Load command config:credentials
Serverless: Load command create
Serverless: Load command install
Serverless: Load command package
Serverless: Load command deploy
Serverless: Load command deploy:function
Serverless: Load command deploy:list
Serverless: Load command deploy:list:functions        
Serverless: Load command invoke
Serverless: Load command invoke:local
Serverless: Load command info
Serverless: Load command logs
Serverless: Load command metrics
Serverless: Load command print
Serverless: Load command remove
Serverless: Load command rollback
Serverless: Load command rollback:function
Serverless: Load command slstats
Serverless: Load command plugin
Serverless: Load command plugin
Serverless: Load command plugin:install
Serverless: Load command plugin
Serverless: Load command plugin:uninstall
Serverless: Load command plugin
Serverless: Load command plugin:list
Serverless: Load command plugin
Serverless: Load command plugin:search
Serverless: Load command config
Serverless: Load command config:credentials
Serverless: Load command rollback
Serverless: Load command rollback:function
Serverless: Load command upgrade
Serverless: Load command uninstall
Serverless: Load command client
Serverless: Load command client:deploy
Serverless: Load command client:remove
Serverless: Load command login
Serverless: Load command logout
Serverless: Load command generate-event
Serverless: Load command test
Serverless: Load command dashboard
Serverless: Load command output
Serverless: Load command output:get
Serverless: Load command output:list
Serverless: Load command param
Serverless: Load command param:get
Serverless: Load command param:list
Serverless: Load command studio
Serverless: Load command dev
Serverless: Invoke deploy
Serverless: Invoke package
Serverless: Invoke aws:common:validate
Serverless: Invoke aws:common:cleanupTempDir
 
  Type Error ---------------------------------------------

  TypeError: region.toLowerCase is not a function     
      at getS3EndpointForRegion (C:\Users\cbraunstein\AppData\Local\Yarn\Data\global\node_modules\serverless\lib\plugins\aws\utils\getS3EndpointForRegion.js:4:28)      at AwsProvider.isS3TransferAccelerationSupported (C:\Users\cbraunstein\AppData\Local\Yarn\Data\global\node_modules\serverless\lib\plugins\aws\provider\awsProvider.js:514:22)
      at AwsPackage.generateCoreTemplate (C:\Users\cbraunstein\AppData\Local\Yarn\Data\global\node_modules\serverless\lib\plugins\aws\package\lib\generateCoreTemplate.js:67:61)
  From previous event:
      at Object.package:initialize [as hook] (C:\Users\cbraunstein\AppData\Local\Yarn\Data\global\node_modules\serverless\lib\plugins\aws\package\index.js:58:56) 
  From previous event:
      at PluginManager.invoke (C:\Users\cbraunstein\AppData\Local\Yarn\Data\global\node_modules\serverless\lib\classes\PluginManager.js:489:22)
      at PluginManager.spawn (C:\Users\cbraunstein\AppData\Local\Yarn\Data\global\node_modules\serverless\lib\classes\PluginManager.js:509:17)
      at C:\Users\cbraunstein\AppData\Local\Yarn\Data\global\node_modules\serverless\lib\plugins\deploy\deploy.js:122:50
  From previous event:
      at Object.before:deploy:deploy [as hook] (C:\Users\cbraunstein\AppData\Local\Yarn\Data\global\node_modules\serverless\lib\plugins\deploy\deploy.js:102:22)  
      at C:\Users\cbraunstein\AppData\Local\Yarn\Data\global\node_modules\serverless\lib\classes\PluginManager.js:489:55
  From previous event:
      at PluginManager.invoke (C:\Users\cbraunstein\AppData\Local\Yarn\Data\global\node_modules\serverless\lib\classes\PluginManager.js:489:22)
      at C:\Users\cbraunstein\AppData\Local\Yarn\Data\global\node_modules\serverless\lib\classes\PluginManager.js:524:24
  From previous event:
      at PluginManager.run (C:\Users\cbraunstein\AppData\Local\Yarn\Data\global\node_modules\serverless\lib\classes\PluginManager.js:524:8)
      at C:\Users\cbraunstein\AppData\Local\Yarn\Data\global\node_modules\serverless\lib\Serverless.js:136:33
  From previous event:
      at Serverless.run (C:\Users\cbraunstein\AppData\Local\Yarn\Data\global\node_modules\serverless\lib\Serverless.js:123:74)
      at C:\Users\cbraunstein\AppData\Local\Yarn\Data\global\node_modules\serverless\scripts\serverless.js:54:26
      at processImmediate (internal/timers.js:456:21) 
      at process.topLevelDomainCallback (domain.js:137:15)
  From previous event:
      at Object.<anonymous> (C:\Users\cbraunstein\AppData\Local\Yarn\Data\global\node_modules\serverless\scripts\serverless.js:54:4)
      at Module._compile (internal/modules/cjs/loader.js:1138:30)
      at Object.Module._extensions..js (internal/modules/cjs/loader.js:1158:10)
      at Module.load (internal/modules/cjs/loader.js:986:32)
      at Function.Module._load (internal/modules/cjs/loader.js:879:14)
      at Module.require (internal/modules/cjs/loader.js:1026:19)
      at require (internal/modules/cjs/helpers.js:72:18)
      at Object.<anonymous> (C:\Users\cbraunstein\AppData\Local\Yarn\Data\global\node_modules\serverless\bin\serverless.js:41:1)
      at Module._compile (internal/modules/cjs/loader.js:1138:30)
      at Object.Module._extensions..js (internal/modules/cjs/loader.js:1158:10)
      at Module.load (internal/modules/cjs/loader.js:986:32)
      at Function.Module._load (internal/modules/cjs/loader.js:879:14)
      at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)
      at internal/main/run_main_module.js:17:47

Installed version

Framework Core: 1.79.0
Plugin: 3.7.1
SDK: 2.3.1
Components: 2.34.6

NOTE:

I added a console.log to line 558 of awsProvider.js:

getRegion() {
    const defaultRegion = 'us-east-1';
    const regionSourceValue = this.getRegionSourceValue();
    console.log('regionSourceValue :>> ', regionSourceValue);
    return regionSourceValue.value || defaultRegion;
  }

And I got the following output:

regionSourceValue :>>  { path: [ 'options', 'region' ], value: true }
Serverless: Invoke package
Serverless: Invoke aws:common:validate
regionSourceValue :>>  { path: [ 'options', 'region' ], value: true }
Serverless: Invoke aws:common:cleanupTempDir
regionSourceValue :>>  { path: [ 'options', 'region' ], value: true }

Seems like value should be a string containing region.

[chanan]

Second note... Same issue happens in getStage(). Once I hard code both those functions I am able to deploy.

I should point out that I used to be able to deploy without an issue till a few days ago. The only thing I recall that changed is that I installed AWS CLI v2 for windows.

[medikoo]

@chanan Do you observe same issue when not relying on a fullstack-serverless plugin?

If it's purely influenced by plugin it should be reported at its repository. If it's not influenced by plugin, can you prepare a test case that doesn't involve any plugin?

[malpaso]

Any update on this? I'm seeing the same error trying to deploy, no plugins and one function.

[myartsev]

+1

[pgrzesik]

@myartsev What version of the Framework are you using? Are you using any plugins?