This roundup covers the most common issues people run into when using Claude day to day: file uploads, citations/sources, chat history sync, and usage-limit notices. If you run into problems, don’t rush to reinstall or switch devices—often a single setting change is enough to get things back to normal. Below is a scenario-based troubleshooting sequence you can follow.
1. What to do if Claude file uploads fail or keep spinning
The most common reasons for upload failures in Claude are files that are too large, incompatible formats, or an unstable network connection—especially on mobile data, where it’s easier to get stuck. You can first save the file as a smaller version (for example, compress a PDF or reduce image resolution), then upload it to Claude again. If it still fails, try switching browsers or clearing the cache and logging back into Claude, and avoid enabling extensions that block scripts.
If you’re uploading a scanned PDF, Claude may not be able to read any valid text, which can look like “it uploads, but it can’t analyze the content.” In that case, run OCR to convert it to text first, or upload a PDF/document with selectable, copyable text, then have Claude extract key points section by section.
2. Claude isn’t showing citations/sources—does that mean the feature is broken?
Whether Claude shows citations depends on whether you ask it to answer based on “traceable materials.” The most reliable approach is to paste the source link or the source content directly into the conversation and explicitly ask Claude to “provide citation locations/excerpts by paragraph.” If you only ask an open-ended question, Claude will often respond using general knowledge, and naturally there won’t be matching sources.
