According to the logs the files are locked / inaccessible to mcebuddy.
WARNING> 2018-02-12T13:28:54 MCEBuddy.Engine.QueueManager → Monitor task Recorded TV : Unable to queue file for conversion - file inaccessible/locked by another process E:\Recorded TV\Mom_FXXHD_2018_02_12_13_00_02.wtv
WARNING> 2018-02-12T13:33:53 MCEBuddy.Engine.QueueManager → Monitor task Recorded TV : Unable to queue file for conversion - file inaccessible/locked by another process E:\Recorded TV\Mom_FXXHD_2018_02_12_13_30_01.wtv
If you’re using a network drive see the Common Issues on how to get have the engine access network drives:
If they are local, check the file permissions, System Account / Local Account needs to have access to the file AND they should not be locked by another process