Can you post the full server log file?
0: Server starting with version 255
0: Error reading cpSecret
0: Starting server NFR Team
0: shortFormationLap is set to false, but is a public server. Will use short formation lap!
0: allowAutoDQ is set to false, but is a public server. Will use auto DQs!
0: Joining during race is allowed
0: FileToStruct cfg/eventRules.json
0: ==ERR: Unknown carGroup 'TCX', please use one of the following: FreeForAll, GT3, Cup, ST, GT4. Server will close.
0: ==ERR: Unknown track 'oulton_park', please pick one of the following:
0: ==ERR: 'monza'
0: ==ERR: 'brands_hatch'
0: ==ERR: 'spa'
0: ==ERR: 'misano'
0: ==ERR: 'paul_ricard'
0: ==ERR: 'zolder'
0: ==ERR: 'silverstone'
0: ==ERR: 'hungaroring'
0: ==ERR: 'nurburgring'
0: ==ERR: 'barcelona'
0: ==ERR: 'zandvoort'
0: ==ERR: 'monza_2019'
0: ==ERR: 'brands_hatch_2019'
0: ==ERR: 'spa_2019'
0: ==ERR: 'misano_2019'
0: ==ERR: 'paul_ricard_2019'
0: ==ERR: 'zolder_2019'
0: ==ERR: 'zandvoort_2019'
0: ==ERR: 'silverstone_2019'
0: ==ERR: 'hungaroring_2019'
0: ==ERR: 'nurburgring_2019'
0: ==ERR: 'barcelona_2019'
0: ==ERR: 'kyalami_2019'
0: ==ERR: 'mount_panorama_2019'
0: ==ERR: 'suzuka_2019'
0: ==ERR: 'laguna_seca_2019'
0: ==ERR: 'monza_2020'
0: ==ERR: 'brands_hatch_2020'
0: ==ERR: 'spa_2020'
0: ==ERR: 'misano_2020'
0: ==ERR: 'paul_ricard_2020'
0: ==ERR: 'zolder_2020'
0: ==ERR: 'zandvoort_2020'
0: ==ERR: 'silverstone_2020'
0: ==ERR: 'hungaroring_2020'
0: ==ERR: 'nurburgring_2020'
0: ==ERR: 'barcelona_2020'
0: ==ERR: 'kyalami_2020'
0: ==ERR: 'mount_panorama_2020'
0: ==ERR: 'suzuka_2020'
0: ==ERR: 'laguna_seca_2020'
0: ==ERR: 'imola_2020'