Problem with contextual components

[adet4ever]

ember-cli: 3.4.1
node: 10.10.0
os: linux x64

on starting the ember application, I get this error message:
Cannot read property 'indexOf' of undefined
Stack Trace and Error Report: /tmp/error.dump.788cf782093e6537f56a264725f71192.log

seems to be an issue with emberx-select-blockless in API addon.
Meanwhile, I understand that the emberx-select-blockless is deprecated, I was able to get it working in ember-cli@3.4.0-beta.2

hasContextualComponents: function () {
   var VersionChecker = require('ember-cli-version-checker');

   var checker = new VersionChecker(this);
   var dep = checker.for('ember', 'bower');

   var isBetaOrCanary = ['beta', 'canary'].filter(function(version) {
     return dep.version.indexOf(version) >= 0;     //dep.version is undefined.
   });

   return !!(dep.satisfies('>= 2.3.0 < 3.0.0') || isBetaOrCanary.length > 0);
 },

works fine in: ember-cli@3.4.0-beta.2
broken in: ember-cli@3.4.1

With trace:

• broccoliBuilderErrorStack: [undefined]
• codeFrame: [undefined]
• errorMessage: Cannot read property 'indexOf' of undefined
• errorType: [undefined]
• location:
  • column: [undefined]
  • file: [undefined]
  • line: [undefined]
• message: Cannot read property 'indexOf' of undefined
• name: TypeError
• nodeAnnotation: [undefined]
• nodeName: [undefined]
• originalErrorMessage: [undefined]
• stack: TypeError: Cannot read property 'indexOf' of undefined
  at /home/monkey/projects/p30m/phmscli/appkit/node_modules/emberx-select-blockless/node_modules/emberx-select/index.js:14:26
  at Array.filter ()
  at Class.hasContextualComponents (/home/monkey/projects/p30m/phmscli/appkit/node_modules/emberx-select-blockless/node_modules/emberx-select/index.js:13:45)
  at Class.treeForAddonTemplates (/home/monkey/projects/p30m/phmscli/appkit/node_modules/emberx-select-blockless/node_modules/emberx-select/index.js:24:14)
  at Class._treeFor (/home/monkey/projects/p30m/phmscli/appkit/node_modules/ember-cli/lib/models/addon.js:617:33)
  at Class._addonTemplateFiles (/home/monkey/projects/p30m/phmscli/appkit/node_modules/ember-cli/lib/models/addon.js:1090:31)
  at Class.compileTemplates (/home/monkey/projects/p30m/phmscli/appkit/node_modules/ember-cli/lib/models/addon.js:1141:81)
  at Class.compileAddon (/home/monkey/projects/p30m/phmscli/appkit/node_modules/ember-cli/lib/models/addon.js:1205:30)
  at Class.treeForAddon (/home/monkey/projects/p30m/phmscli/appkit/node_modules/ember-cli/lib/models/addon.js:860:26)
  at Class._treeFor (/home/monkey/projects/p30m/phmscli/appkit/node_modules/ember-cli/lib/models/addon.js:617:33)

Any suggestions, help is appreciated