ERROR20007:<Custom Integrator Key Name> has an invalid Integrator Key.
1. Go into the responsibility: System Administrator
2. Navigate to Profiles> System
3. Set profile 'BNE_ALLOW_NO_SECURITY_RULE' option to 'YES' at site level for your user.
Clear the cache / bounce the server.
4. Retest the issue.
5. Migrate the solution as appropriate to other environments.