"The Link Style name does not exist or is of an incorrect type"

Hi All,

I am writing a paper for ICED Conference 2021. They have given a fixed template for writing the paper. I am not able to insert the reference. It is giving this error message: “The Link Style name does not exist or is of an incorrect type” and I am not able to get the bibliography. I am attaching the template.

Please suggest some way to resolve the issues.

 Thanking you all in advance.

to upload a file - zip it up first.  Then attach.