I must say that I I don't know what could be causing this. It sounds like the tokens that we generate for the sidebar contents are somehow expiring or otherwise invalid, but I cannot reproduce that with e.g. Stand-up.
I think your best bet is to contact HipChat Support, maybe they have had similar cases and would be able to help you.
Earlier this year we made the difficult decision to discontinue our team messaging tools, Stride and Hipchat. The end of life date for Stride and Hipchat Cloud is quickly approaching - February 15, 2...
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