Accommodations should be booked by the participants themselves.
Here is a sample list of possible hotels and hostels nearest to the Congress venue:

These are all within walking distance to the Congress venue.

There are also a lot of apartments available for rent. Feel free to explore for more options via or other services.
The Congress venue is located in the center of Kaunas at Vytautas Magnus University, whose address is – S.Daukanto str. 28, Kaunas, Lithuania.

There are many public transit stops nearby the Congress venue, which is reachable from any part of Kaunas.
Here is a suggested app and website for traveling in the city: