Windows 10 - Zwift keep crashing while riding

Zwift keep crashing while riding wasting my time and effort since the progress is not being recorded. Has anyone experienced same. Any advice? I have removed the dongle that in some posts suggested to cause Zwift to crash. It worked for a couple of days but today it crashed again. Please help.

Partial log with some of the errors:
[8:10:28] Log Time: 8:10:28 2021-02-17

[8:10:28] Game Version: 1.0.61590

[8:10:28] Config: Shipping

[8:10:28] Device: PC

[8:10:28] Launcher Version : 1.0.50
[8:10:50] Tried to load a valid xml file, but it seems to not really be a ZWO file?

[8:10:50] LoadWorkout failed to load.

[8:10:50] Failed workout path: TrainingPlans/3day13one_FESTIVAL.xml

[8:10:50] Tried to load a valid xml file, but it seems to not really be a ZWO file?

[8:10:50] LoadWorkout failed to load.

[8:10:50] Failed workout path: TrainingPlans/trainingplans.xml

[8:10:50] Tried to load a valid xml file, but it seems to not really be a ZWO file?

[8:10:50] LoadWorkout failed to load.

[8:10:50] Failed workout path: TrainingPlans/3day13one.xml

[8:10:50] Tried to load a valid xml file, but it seems to not really be a ZWO file?

[8:10:50] LoadWorkout failed to load.

[8:10:50] Failed workout path: TrainingPlans/5kRecordBreaker.xml

[8:10:50] Tried to load a valid xml file, but it seems to not really be a ZWO file?

[8:10:50] LoadWorkout failed to load.

[8:10:50] Failed workout path: TrainingPlans/6wk_FTP_Builder.xml

[8:10:50] Tried to load a valid xml file, but it seems to not really be a ZWO file?

[8:10:50] LoadWorkout failed to load.

[8:10:50] Failed workout path: TrainingPlans/8wkRacePrep.xml

[8:10:50] Tried to load a valid xml file, but it seems to not really be a ZWO file?

[8:10:50] LoadWorkout failed to load.

[8:10:50] Failed workout path: TrainingPlans/12wk_Winter_Plan.xml

[8:10:50] Tried to load a valid xml file, but it seems to not really be a ZWO file?

[8:10:50] LoadWorkout failed to load.
[8:10:59] NETCLIENT:[INFO] Auxiliary Controller failed to connect to socket: ‘No connection could be made because the target machine actively refused it.’ (10061)

[8:11:00] Starting critical power curve search job (347423577) mTimeStamp = 10.00600 m_lastSearchTime = 10.00600 calculating=false

[8:11:00] NETWORK:error (6) sending player state

[8:11:01] NETCLIENT:[INFO] Auxiliary Controller attempting to connect to phone at: 192.168.100.4:21587

[8:11:01] NETWORK:error (6) sending player state

[8:11:02] FPS 23, 3101, 14640, -2099

[8:11:02] NETWORK:error (6) sending player state

[8:11:03] NETWORK:error (6) sending player state

[8:11:03] “Tacx Flux-2 06456 89” adding component type: 8 (BLE)
[9:39:50] NETCLIENT:[INFO] Sending telemetry…

[9:39:50] NETCLIENT:[INFO] UDP metrics {StC Rx: 0, Rx error: 0, CtS Tx: 0, Tx error: 0}

[9:39:51] NETCLIENT:[INFO] Telemetry successfully sent

[9:40:10] NETCLIENT:[WARN] UDP connection timeout (55 so far), reconnection attempt 55

[9:40:10] NETCLIENT:[INFO] Connecting to UDP server…