Bug when creating a community with members with and without KSM

[ail3ngrimaldi]

Expected Behaviour:

Creating a community should work in all scenarios, regardless of whether the invited members have KSM or not.

Current Behaviour:

There are a few scenarios so we'll check all of them:

1. Scenario 1: Create a community inviting a member without KSM (works).
2. Scenario 2: Create a community inviting a member with KSM (works).
3. Scenario 3: Create a community inviting one member with KSM and one without KSM (doesn't work).
4. Scenario 4: Create a community inviting one member with KSM and N members without KSM (doesn't work).
5. Scenario 5: Create a community inviting N members without KSM (doesn't work).
6. Scenario 6: Create a community inviting N members with KSM (doesn't work).

In the failing scenarios, no error is shown, the fee is deducted, but the community is not created.