Hi
I've not seen an error like this before. So as a guess....
It would appear that EAServer has received a TDS packet of data from something that it was not expecting.
TDS is Tabular Data Stream https://en.wikipedia.org/wiki/Tabular_Data_Stream
According to EAServer errors the following is
srv__read_packet: Protocol error occurred: length in header (21536) more than packet size(512) | Verify that the listener port matches the client protocol. |
You need to verify what is listening on the ports being used by EAServer, is it possible something else is listening on the ports.
This is a low level networking problem on the server.