Can't assign a group to a Backend-to-Backend application

[Mattue]

Describe the bug

It's not possible to assign application to a group. When trying to add group 400 Bad request is returned.

To Reproduce

Prerequisites:

1. Created and valid Backend-to-Backend application
2. Created and valid Group

Steps to reproduce the behavior:

1. Open console ui
2. Log in
3. Go to Applications
4. Click on your Backend-to-Backend application
5. Scroll to Access-Control section
6. Chose any group
7. Click SAVE
8. See Bad request error on bottom right corner

Expected behavior

Group is assigned to Backend-to-Backend application with no issue.

Current behavior

Group is not assigning to Backend-to-Backend application with Bad request error

Useful information

UI Request

PUT [http://localhost:8083/management/organizations/DEFAULT/environments/DEFAULT/applications/a086537d-7a60-4e4c-8653-7d7a601e4c94](http://localhost:8083/management/organizations/DEFAULT/environments/DEFAULT/applications/a086537d-7a60-4e4c-8653-7d7a601e4c94)([http://localhost:8083/management/organizations/DEFAULT/environments/DEFAULT/applications/a086537d-7a60-4e4c-8653-7d7a601e4c94](http://localhost:8083/management/organizations/DEFAULT/environments/DEFAULT/applications/a086537d-7a60-4e4c-8653-7d7a601e4c94))

{
 "name": "test13",
 "description": "test13",
 "groups": [
 "7088a6a8-68f8-41df-88a6-a868f881dfe9"
 ],
 "settings": {
 "oauth": 

 { "client_id": "d2e5bdf6-6003-44a2-ae1f-f740838ae2c5", "client_secret": "5TxrRLuCbkds3q2vkekzfpl5aLQwQ3lP", "redirect_uris": [], "response_types": [ "code", "none" ], "grant_types": [ "authorization_code", "client_credentials" ], "renew_client_secret_supported": false } 

 },
 "disable_membership_notifications": false,
 "api_key_mode": "UNSPECIFIED"
 }

UI Response

{
 "parameters": 

 { "targetGrantTypes": "authorization_code|client_credentials" } 

,
 "technicalCode": "application.grantTypesNotAllowed",
 "http_status": 400
 }

Environment

APIM 3.20.14

Dependencies

In 3.20.13 error was Cannot invoke "String.toLowerCase()" because "typeId" is null as in #9157 , so maybe related to #8661

[exalate-issue-sync]

This issue has been fixed in versions 4.0.11, 3.20.22, 4.2.0, 4.1.2