One of the main issues I encountered was some things, like garden pot, automatic shearer/milker, and some furniture are invisible. When hovering over the block in my inventory, I can see the item description, but the actual sprite is missing.

Hi @Setara253. It sounds like you installed an outdated XNB mod which replaced Content\Maps\springobjects.xnb with an older version. You can reset your content files to fix that. I suggest only using SMAPI mods and Content Patcher packs to avoid issues like that.

(The GitHub issues here are only used for SMAPI development tasks. If you still need help, feel free to ask on Discord or post in the SMAPI support thread.)