CRM 2016 CRM outlook client error, when we change custom form types within Contact and Organisation entities

Hi there,

I know CRM outlook client is never a smooth way to deal. This time I have created multiple forms for contact and organization entity. When we launch CRM in outlook, open any existing Contact or Organisation record, then on change of form, we get 'Script error: An error has occurred in the script of the page'

This is not happening on the webclient, only happens in outlook client.

Backgroud: We facing this error upon upgrade from CRM 4 to CRM 2016 on premise. I am on Systemadmin.

Any suggesstions or fix would really help.

Thanks,

Sama.