This error is a known issue related to the Nutanix AHV Plugin for Citrix (MCS plugin) when interacting with a Nutanix cluster that has a high number of snapshots (as indicated by the 4797 count).

Older versions of the plugin utilized a JSON serializer with a default character limit (maxJsonLength). When the plugin attempts to fetch the inventory of snapshots (GetContent) to present them in the Citrix Studio wizard, the resulting JSON string exceeds this limit, causing the serialization exception and failing the catalog creation process.

The resolution, documented in Nutanix/Citrix Knowledge Base articles, is to upgrade the Nutanix AHV Plugin for Citrix to the latest version. Newer versions of the plugin handle large datasets more efficiently (often through pagination or increased limits), allowing the inventory to load successfully despite the large number of existing snapshots.