There are some common reasons why chat disappears:
- You're using a browser that doesn't support chat.
Make sure that you're using a fully supported browser to log in to Gmail.
- You're not using the standard version of Gmail.
Scroll to the bottom of any Gmail page and click standard to select this version. Chat is not available in the basic HTML view.
- You're not using a language interface that supports chat.
Chat is currently available in these display languages: Danish, German, English (UK), English (US), Spanish, Finnish, French, Italian, Japanese, Korean, Dutch, Polish, Portuguese, Russian, Swedish, Turkish, Chinese (Simplified), Chinese (Traditional), Bulgarian, Catalan, Czech, Greek, Estonian, Hindi, Croatian, Hungarian, Indonesian, Icelandic, Lithuanian, Latvian, Romanian, Slovak, Slovenian, Serbian (Cyrillic), Thai, Tagalog, Ukrainian, and Vietnamese.
- Your Chat list is collapsed.
Make sure that the Chat icon at the bottom of your Gmail window is selected.