Try deleting Bolts.framework from linked framework and re-add it. Also, in your Framework Search Path keep path until Bolts.framework like $(PROJECT_DIR)/Bolts if it is inside Bolts folder at your project directory path.
I opened the bounty: “Looking for an answer drawing from credible and/or official sources.” but haven’t receive such since then. While answer provided by @jackslash is correct, it tells only a part of story so I want to write my own in a way I would like to have seen it at the moment I … Read more
This usually happens after a project rename or something like that. The problem is that the umbrella header is no longer listed as a Public header. Check the attached image to see how to fix this.