You may be asked by our support team to get the Devolutions Server log files. They are located in the Devolutions Server web app App_Data folder.
The files that are needed from this location the ones starting with "DPS_Main" (DPS_Main_001.log, DPS_Main_002.log, etc.). If they are not present, it is most likely because the Application Pool Identity cannot write in that folder. Resolve this issue by giving this identity the Modify permission on the App_Data folder.