User defined document 'restforms2.MODULE' not supported

[v23ent]

Trying to install restforms2 using zpm. Getting this error...
Please see the second command execution.

zpm: CBS-PMS>install restforms

ERROR #5844: User defined document 'restforms.MODULE' not supported. No user defined document class in this namespace.
  > ERROR #6315: Errors reporting importing XML subelement in file '/opt/intersystems/I2019/mgr/.modules/CBS-PMS/restforms/1.6.1/module.xml' at line '3' offset '35', skipping this item.
ERROR #5844: User defined document 'restforms.MODULE' not supported. No user defined document class in this namespace.
  > ERROR #6315: Errors reporting importing XML subelement in file '/opt/intersystems/I2019/mgr/.modules/CBS-PMS/restforms/1.6.1/module.xml' at line '3' offset '35', skipping this item.
zpm: CBS-PMS>install restforms2

ERROR #5844: User defined document 'restforms2.MODULE' not supported. No user defined document class in this namespace.
  > ERROR #6315: Errors reporting importing XML subelement in file '/opt/intersystems/I2019/mgr/.modules/CBS-PMS/restforms2/1.0.0/module.xml' at line '3' offset '38', skipping this item.
ERROR #5844: User defined document 'restforms2.MODULE' not supported. No user defined document class in this namespace.
  > ERROR #6315: Errors reporting importing XML subelement in file '/opt/intersystems/I2019/mgr/.modules/CBS-PMS/restforms2/1.0.0/module.xml' at line '3' offset '38', skipping this item.