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Date & Time: 9/10/17
Frequency: Always/ongoing
World name: Siren
Character name: Mightybear Seven
Retainer name:
NPC name: Chocobo Stable
Monster name:
Class/Level: All classes
Party or solo: Solo
In-game time: All
Area and coordinates: Mist Subdivision (13.3,12.1)
Housing: 10th Ward, Plot 39 (small, FC)
Steps:
1. Going to the chocobo stable to train a chocobo, click on stable
2. Have selected the training option and my menu opens to select a reward food
3. When selecting the food and pushing "train", I receive the error "cannot execute at this time"

I have already eliminated/ruled out the possible as intended reasons for this message occurring:
-Insufficient FC permissions to train chocobos at stable
-Chocobo stabled within the hour
-Chocobo already at max EXP and needs to fight a monster before leveling further
-Chocobo trained within the hour

My other FC officers can train my chocobo and others, but I cannot. So this isn't a widespread bug, but must only be effecting a small number of users.
I was able to train my chocobo on Balmung, but I don't believe I have been able to do so since transferring to Siren on 8/11.

In case this is helpful:

-=-=-=-=-=-=- System Information -=-=-=-=-=-=-

SYSTEM_OS Windows 10 Home 64-bit (6.2, Build 9200) (15063.rs2_release.170317-1834)
SYSTEM_CPU Intel(R) Core(TM) i5-6600K CPU @ 3.50GHz (4 CPUs), ~3.5GHz
SYSTEM_CORE_NUM SYSTEM_CORE_LOGIC 4 SYSTEM_CORE_PHYSICS 4
SYSTEM_BIOS Default System BIOS
SYSTEM_LANGUAGE English (Regional Setting: English)
SYSTEM_MEMORY 16336.984MB
SYSTEM_VIRTUAL_MEMORY 134217727.875MB
SYSTEM_PAGE_FILE 32720.984MB
SYSTEM_STORAGE C:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 110.955GB SYSTEM_FREEDISC_SPACE 27.084GB
SYSTEM_STORAGE E:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 931.021GB SYSTEM_FREEDISC_SPACE 583.269GB
SYSTEM_DIRECTX_VERSION DirectX 12
SYSTEM_GRAPHICS AMD Radeon (TM) R9 390 Series
SYSTEM_GRAPHICS_DEVICE \\.\DISPLAY1
SYSTEM_GRAPHICS_CHIP AMD Radeon Graphics Processor (0x67B1)
SYSTEM_GRAPHICS_MAKER Advanced Micro Devices, Inc.
SYSTEM_GRAPHICS_VRAM 8169.469 MB
SYSTEM_GRAPHICS_SHARED_VRAM 8168.492 MB
SYSTEM_GRAPHICS_DAC Internal DAC(400MHz)
SYSTEM_GRAPHICS_DISPLAY_MODE 1920 x 1080 (32 bit) (60Hz)
SYSTEM_GRAPHICS_DRIVER C:\WINDOWS\System32\DriverStore\FileRepository\c0313676.inf_amd64_96bbc33bec5c7fae\aticfx64.dll,C:\WINDOWS\System32\DriverStore\FileRepository\c0313676.inf_amd64_96bbc33bec5c7fae\aticfx64.dll,C:\WINDOWS\System32\DriverStore\FileRepository\c0313676.inf_amd64_96bbc33bec5c7fae\aticfx64.dll,C:\WINDOWS\System32\DriverStore\FileRepository\c0313676.inf_amd64_96bbc33bec5c7fae\amdxc64.dll
SYSTEM_GRAPHICS_DRIVER_VERSION 22.19.0162.0004
SYSTEM_GRAPHICS_DRIVER_DATE 4/23/2017 19:00:00
SYSTEM_GRAPHICS_DRIVER_LANGUAGE English
3.0
SYSTEM_GRAPHICS_PIXEL_SHADER 3.0
SYSTEM_GRAPHICS_VERTEX_TEXTURE SYSTEM_SUPPORT
SYSTEM_SOUND Speakers (Realtek High Definition Audio)
SYSTEM_SOUND_DEVICE_ID {0A8C3474-1785-47C5-A66F-9219D27EB2E3}
SYSTEM_SOUND_DEVICE_NAME RTKVHD64.sys
SYSTEM_SOUND_DRIVER_VERSION 6.00.0001.8036
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 1/5/2017 00:00:00
SYSTEM_SOUND Realtek Digital Output (Realtek High Definition Audio)
SYSTEM_SOUND_DEVICE_ID {441AAFAF-3347-485D-894E-35EF51352006}
SYSTEM_SOUND_DEVICE_NAME RTKVHD64.sys
SYSTEM_SOUND_DRIVER_VERSION 6.00.0001.8036
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 1/5/2017 00:00:00
SYSTEM_SOUND 1 - VX248 (AMD High Definition Audio Device)
SYSTEM_SOUND_DEVICE_ID {5D04F062-4237-42E8-8888-DF3310FE3F37}
SYSTEM_SOUND_DEVICE_NAME AtihdWT6.sys
SYSTEM_SOUND_DRIVER_VERSION 10.00.0000.0003
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 4/13/2016 00:00:00
SYSTEM_INPUT {6F1D2B60-D5A0-11CF-BFC7444553540000}
SYSTEM_INPUT_NAME Mouse
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 3 SYSTEM_GAMEPAD_BUTTON 8 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {6F1D2B61-D5A0-11CF-BFC7444553540000}
SYSTEM_INPUT_NAME Keyboard
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 128 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {4FBFD580-1647-11E6-8001444553540000}
SYSTEM_INPUT_NAME HP USB Multimedia Keyboard
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 573 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {4FC098D0-1647-11E6-8002444553540000}
SYSTEM_INPUT_NAME HP USB Multimedia Keyboard
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 3 SYSTEM_GAMEPAD_FOV 0
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Thanks!