Any Company > Partner login> Regular Sub Template> Click on Add Subtemplate buttton displays Blank pop up

Click on Add Subtemplate button displays Blank pop up while creating new export template

Steps to Regenerate

1) Add New Template
2) Traverse till Sub Template
3) Click on Save & Continue without adding any subtemplate (Validation message to add subtemplate will get displayed)
4) Again click on Add Sub Template

Result: Blank pop up messgae will get displayed for click on Add Sub Template

Happens in below case as well

1) Add New Template
2) Traverse till Sub Template
3) Add a subtemplate
4) Delete Subtemplate
5) Click again on subtemplate

PFA below screenshot