Unable to add attribute in the schema using dsconf or via cockpit UI. Getting "value has to be of str, was 'caseignorematch" error.

Issue

• Unable to add attribute in the schema using dsconf or via cockpit UI.
• Getting value has to be of str, was 'caseignorematch error. i.e:

[root@rhds] # dsconf -D "cn=Directory Manager" ldaps://rhds.example.com  schema attributetypes add --oid 1.3.6.1.4.1.53380.2.1.21 --x-origin TEST  --single-value --equality caseignorematch --usage userApplications --syntax 1.3.6.1.4.1.1466.115.121.1.15  sampleattribute
Enter password for cn=Directory Manager on ldaps://rhds.example.com:636
Error: value has to be of str, was 'caseignorematch'