diff --git a/changelogs/fragments/8794-Fixing-possible-concatination-error.yaml b/changelogs/fragments/8794-Fixing-possible-concatination-error.yaml
new file mode 100644
index 0000000000..a94eace415
--- /dev/null
+++ b/changelogs/fragments/8794-Fixing-possible-concatination-error.yaml
@@ -0,0 +1,2 @@
+bugfixes:
+  - proxmox inventory plugin - fixed a possible error on concatenating responses from proxmox. In case an API call unexpectedly returned an empty result, the inventory failed with a fatal error. Added check for empty response (https://github.com/ansible-collections/community.general/issues/8798, https://github.com/ansible-collections/community.general/pull/8794).
diff --git a/plugins/inventory/proxmox.py b/plugins/inventory/proxmox.py
index 774833c488..f784e47a34 100644
--- a/plugins/inventory/proxmox.py
+++ b/plugins/inventory/proxmox.py
@@ -329,8 +329,9 @@ class InventoryModule(BaseInventoryPlugin, Constructable, Cacheable):
                     data = json['data']
                     break
                 else:
-                    # /hosts 's 'results' is a list of all hosts, returned is paginated
-                    data = data + json['data']
+                    if json['data']:
+                        # /hosts 's 'results' is a list of all hosts, returned is paginated
+                        data = data + json['data']
                     break
 
             self._cache[self.cache_key][url] = data