panic in terraform-provider-site24x7_v1.0.90 plugin

[valugi]

The plugin encountered an error, and failed to respond to the plugin.(*GRPCProvider).ReadResource call. The plugin logs may contain more details.
╵
╷
│ Error: Plugin did not respond
│ 
│   with module.website.site24x7_website_monitor.website,
│   on .terraform/modules/website/main.tf line 1, in resource "site24x7_website_monitor" "website":
│    1: resource "site24x7_website_monitor" "website" {
│ 
│ The plugin encountered an error, and failed to respond to the plugin.(*GRPCProvider).ReadResource call. The plugin logs may contain more details.
╵

Stack trace from the terraform-provider-site24x7_v1.0.90 plugin:

panic: interface conversion: interface {} is nil, not string

goroutine 26 [running]:
github.com/site24x7/terraform-provider-site24x7/site24x7/monitors.updateDomainExpiryMonitorResourceData(0xc000134000, 0xc00037e2c0)
        github.com/site24x7/terraform-provider-site24x7/site24x7/monitors/domain_expiry.go:422 +0xf0d
github.com/site24x7/terraform-provider-site24x7/site24x7/monitors.domainExpiryMonitorRead(0xc000134000, 0x1aea8c0, 0xc00046a8e0, 0xc000134000, 0x0)
        github.com/site24x7/terraform-provider-site24x7/site24x7/monitors/domain_expiry.go:253 +0xf7
github.com/hashicorp/terraform-plugin-sdk/helper/schema.(*Resource).RefreshWithoutUpgrade(0xc000046c80, 0xc0000a4730, 0x1aea8c0, 0xc00046a8e0, 0xc00020a440, 0x0, 0x0)
        github.com/hashicorp/[email protected]/helper/schema/resource.go:455 +0x12e
github.com/hashicorp/terraform-plugin-sdk/internal/helper/plugin.(*GRPCProviderServer).ReadResource(0xc0000c45a0, 0x1c67410, 0xc000548d80, 0xc0000a4640, 0xc0000c45a0, 0xc000548d80, 0xc000256a50)
        github.com/hashicorp/[email protected]/internal/helper/plugin/grpc_provider.go:525 +0x3dd
github.com/hashicorp/terraform-plugin-sdk/internal/tfplugin5._Provider_ReadResource_Handler(0x1ac2c40, 0xc0000c45a0, 0x1c67410, 0xc000548d80, 0xc00070c120, 0x0, 0x1c67410, 0xc000548d80, 0xc00061a600, 0x2c7)
        github.com/hashicorp/[email protected]/internal/tfplugin5/tfplugin5.pb.go:3153 +0x214
google.golang.org/grpc.(*Server).processUnaryRPC(0xc00037e160, 0x1c6fe18, 0xc000437080, 0xc00061e000, 0xc00013f350, 0x2159570, 0x0, 0x0, 0x0)
        google.golang.org/[email protected]/server.go:995 +0x482
google.golang.org/grpc.(*Server).handleStream(0xc00037e160, 0x1c6fe18, 0xc000437080, 0xc00061e000, 0x0)
        google.golang.org/[email protected]/server.go:1275 +0xd2c
google.golang.org/grpc.(*Server).serveStreams.func1.1(0xc0000ba750, 0xc00037e160, 0x1c6fe18, 0xc000437080, 0xc00061e000)
        google.golang.org/[email protected]/server.go:710 +0xab
created by google.golang.org/grpc.(*Server).serveStreams.func1
        google.golang.org/[email protected]/server.go:708 +0xa5

Error: The terraform-provider-site24x7_v1.0.90 plugin crashed!

This is always indicative of a bug within the plugin. It would be immensely
helpful if you could report the crash with the plugin's maintainers so that it
can be fixed. The output above should help diagnose the issue.