Embedded dashboards don't show tiles properly

Also figured it would be worthwhile submitting my embedDashboard function

public async Task<ActionResult> EmbedDashboard()
        {
            EmbedConfig[] errorArr = new EmbedConfig[1];
            //loop that finds the groupID assigned to the currently logged in user
            foreach (Claim claim in ClaimsPrincipal.Current.Claims)
            {
                if (claim.Type == "extension_GroupID")
                {
                    GroupId = claim.Value;
                }
            }
            var error = GetWebConfigErrors();
            if (error != null)
            {
                errorArr[0] = new EmbedConfig()
                {
                    ErrorMessage = error
                };
                return View(errorArr);
            }

            // Create a user password cradentials.
            var credential = new UserPasswordCredential(Username, Password);

            // Authenticate using created credentials
            var authenticationContext = new AuthenticationContext(AuthorityUrl);
            var authenticationResult = await authenticationContext.AcquireTokenAsync(ResourceUrl, ClientId, credential);

            if (authenticationResult == null)
            {
                errorArr[0] = new EmbedConfig()
                {
                    ErrorMessage = "Authentication failed."
                };
                return View(errorArr);
            }

            var tokenCredentials = new TokenCredentials(authenticationResult.AccessToken, "Bearer");

            // Create a Power BI Client object. It will be used to call Power BI APIs.
            using (var client = new PowerBIClient(new Uri(ApiUrl), tokenCredentials))
            {
                // Get a list of dashboards.
                var dashboards = await client.Dashboards.GetDashboardsInGroupAsync(GroupId);

                if (dashboards.Value.Count == 0)
                {
                    errorArr[0] = new EmbedConfig()
                    {
                        ErrorMessage = "Group has no dashboards."
                    };
                    return View(errorArr);
                }

                EmbedConfig[] configArr = new EmbedConfig[dashboards.Value.Count];
                for (int i = 0; i < dashboards.Value.Count; i++)
                {
                    // Get the i'th element in the group
                    var dashboard = dashboards.Value.ElementAtOrDefault(i); 

                    // Generate Embed Token.
                    var generateTokenRequestParameters = new GenerateTokenRequest(accessLevel: "view");
                    var tokenResponse = await client.Dashboards.GenerateTokenInGroupAsync(GroupId, dashboard.Id, generateTokenRequestParameters);

                    if (tokenResponse == null)
                    {
                        errorArr[i] = new EmbedConfig()
                        {
                            ErrorMessage = "Failed to generate embed token."
                        };
                        return View(errorArr);
                    }
                    //populate an array with information about every dashboard in the workspace
                    configArr[i] = new EmbedConfig()
                    {
                        EmbedToken = tokenResponse,
                        EmbedUrl = dashboard.EmbedUrl,
                        Id = dashboard.Id,
                        Dashboards = dashboards
                    };
                }

                return View(configArr);
            }
        }