No tokens on ETB?

Hi guys.
Is anyone having this issue? Creatures that put tokens when they enter the battlefield are not generating any tokens for me. Luckily I have this error to show you:
[lua] [string "HUNTMASTER_OF_THE_FELLS_CW_262875_TITLE (RESOLUTION_TIME_ACTION)~0x00000823"]:2: attempt to call field 'DoCardRegistration_Resolution' (a nil value)
[lua] [string "HUNTMASTER_OF_THE_FELLS_CW_262875_TITLE (RESOLUTION_TIME_ACTION)~0x00000823"]:2: attempt to call field 'DoCardRegistration_Resolution' (a nil value)
[lua] [string "HUNTMASTER_OF_THE_FELLS_CW_262875_TITLE (RESOLUTION_TIME_ACTION)~0x00000823"]:2: attempt to call field 'DoCardRegistration_Resolution' (a nil value)
[lua] [string "HUNTMASTER_OF_THE_FELLS_CW_262875_TITLE (RESOLUTION_TIME_ACTION)~0x00000b18"]:2: attempt to call field 'DoCardRegistration_Resolution' (a nil value)
[lua] [string "HUNTMASTER_OF_THE_FELLS_CW_262875_TITLE (RESOLUTION_TIME_ACTION)~0x00000b18"]:2: attempt to call field 'DoCardRegistration_Resolution' (a nil value)
[lua] [string "HUNTMASTER_OF_THE_FELLS_CW_262875_TITLE (RESOLUTION_TIME_ACTION)~0x00000b18"]:2: attempt to call field 'DoCardRegistration_Resolution' (a nil value)
[lua] [string "HUNTMASTER_OF_THE_FELLS_CW_262875_TITLE (RESOLUTION_TIME_ACTION)~0x00000df7"]:2: attempt to call field 'DoCardRegistration_Resolution' (a nil value)
[lua] [string "HUNTMASTER_OF_THE_FELLS_CW_262875_TITLE (RESOLUTION_TIME_ACTION)~0x00000df7"]:2: attempt to call field 'DoCardRegistration_Resolution' (a nil value)
[lua] [string "HUNTMASTER_OF_THE_FELLS_CW_262875_TITLE (RESOLUTION_TIME_ACTION)~0x00000df7"]:2: attempt to call field 'DoCardRegistration_Resolution' (a nil value)
This is not the only card with this problem. It seems to be a general issue with tokens.
Thanks in advance.
Is anyone having this issue? Creatures that put tokens when they enter the battlefield are not generating any tokens for me. Luckily I have this error to show you:
[lua] [string "HUNTMASTER_OF_THE_FELLS_CW_262875_TITLE (RESOLUTION_TIME_ACTION)~0x00000823"]:2: attempt to call field 'DoCardRegistration_Resolution' (a nil value)
[lua] [string "HUNTMASTER_OF_THE_FELLS_CW_262875_TITLE (RESOLUTION_TIME_ACTION)~0x00000823"]:2: attempt to call field 'DoCardRegistration_Resolution' (a nil value)
[lua] [string "HUNTMASTER_OF_THE_FELLS_CW_262875_TITLE (RESOLUTION_TIME_ACTION)~0x00000823"]:2: attempt to call field 'DoCardRegistration_Resolution' (a nil value)
[lua] [string "HUNTMASTER_OF_THE_FELLS_CW_262875_TITLE (RESOLUTION_TIME_ACTION)~0x00000b18"]:2: attempt to call field 'DoCardRegistration_Resolution' (a nil value)
[lua] [string "HUNTMASTER_OF_THE_FELLS_CW_262875_TITLE (RESOLUTION_TIME_ACTION)~0x00000b18"]:2: attempt to call field 'DoCardRegistration_Resolution' (a nil value)
[lua] [string "HUNTMASTER_OF_THE_FELLS_CW_262875_TITLE (RESOLUTION_TIME_ACTION)~0x00000b18"]:2: attempt to call field 'DoCardRegistration_Resolution' (a nil value)
[lua] [string "HUNTMASTER_OF_THE_FELLS_CW_262875_TITLE (RESOLUTION_TIME_ACTION)~0x00000df7"]:2: attempt to call field 'DoCardRegistration_Resolution' (a nil value)
[lua] [string "HUNTMASTER_OF_THE_FELLS_CW_262875_TITLE (RESOLUTION_TIME_ACTION)~0x00000df7"]:2: attempt to call field 'DoCardRegistration_Resolution' (a nil value)
[lua] [string "HUNTMASTER_OF_THE_FELLS_CW_262875_TITLE (RESOLUTION_TIME_ACTION)~0x00000df7"]:2: attempt to call field 'DoCardRegistration_Resolution' (a nil value)
This is not the only card with this problem. It seems to be a general issue with tokens.
Thanks in advance.