No, we have only one esxi server.

VMWare vSphere ESXi 5.5.0 1623387 (5.5 Update 1, Release date: 2014-03-11, KB 2065832)

When i browse datastore1, and put mouse on folder pp01pg(it is empty), i can see in vmkernel.log:

2016-07-15T08:36:59.468Z cpu6:34334 opID=9139c677)Vol3: 2612: Failed to get object 28 type 3 uuid 5396f301-0ba5f0ec-7920-c81f66ee85fd FD 2b407704 gen 67d :Not found

2016-07-15T08:36:59.469Z cpu6:34334 opID=9139c677)Vol3: 2612: Failed to get object 28 type 3 uuid 5396f301-0ba5f0ec-7920-c81f66ee85fd FD 2b407704 gen 67d :Not found

2016-07-15T08:36:59.469Z cpu6:34334 opID=9139c677)Vol3: 2612: Failed to get object 28 type 3 uuid 5396f301-0ba5f0ec-7920-c81f66ee85fd FD 2b407704 gen 67d :Not found

2016-07-15T08:36:59.469Z cpu6:34334 opID=9139c677)Vol3: 2612: Failed to get object 28 type 3 uuid 5396f301-0ba5f0ec-7920-c81f66ee85fd FD 2b407704 gen 67d :Not found

No other error messages.

I try to delete this folder, and get same error in vmkernel.log, and: