Hi @Jennifer Thomas ,
This should be a problem of compatibility of SQL Server Reporting Services 2012 with Edge and Chrome. I suggest you upgrade the server to 2017 or higher version (2019).
Or you could try to use Edge IE mode to use SSRS 2012 in Edge. You could refer to this document to learn how to configure Edge IE mode using Group Policy, I am not sure if it works.
An associated case for your reference: SSRS compatibility with Edge.
Best Regards,
Joy
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