I think the recipe might be looking for "gold_ingots" instead of "gold_ingot"?

"Failed to parse recipe 'basicshields:golden_shield[minecraft:crafting_shaped]'! Falling back to vanilla: com.google.gson.JsonSyntaxException: Unknown item tag 'c:gold_ingots'"

For now you can download the file from the releases tab in this github or at https://modrinth.com/mod/basic-shields-fabric. Because I'm having some issues with curseforge for some reason.

It's because I was trying to make it accept the c:gold_ingots tag instead of hardcoding the item it uses. I guess I forgot to actually initialize the tag.

I'll have a bugfix update out soon

Update 1.2.1 will contain this fix