Sorry, I did not mean to confuse you. There was an issue with Biomes O Plenty as well that required acess to the server's general config file in order to enable the correct setting. I found a work around for it so there is no need to be concerned. I was just trying to show that have looked for a solution as to not bother you guys for this issue, but was unable to find one, unlike the issue with Biomes O Plenty where I was able to find a way to make it work without needing your help.
Here is the issue with HarvestCraft: When the creator did a silly little change to config file: changing the capital "I" to a lowercase "i", the file never got updated for FTB therefore the items do not generate when breaking certain shrubs. The fix for it is to replace the default config file with the new updated one that shows the item list with the lowercase "i". I have deleted the HarvestCraft config file on my side and it works fine now in single player. What you need to do is get the updated config file, delete the old one and add the new one. I guess its a 50/50 chance that when reloading the mod, that it simply add is the old one again instead of updating it to the new one like it does on the client side. Here is a link to the correct config file just in case that is the issue. https://pastebin.com/p8d0jxwQ
Thank you for working with me on this. Again, so sorry for the confusion!