I have a fresh installation of Heartbeat 7.x-1.0 and am experiencing the same error when trying to place the Site Activity block on a page. It appears fine as a tab on the user profile, but not as a block. For me, however, it didn't matter what the permission setting on that block was - it always showed the error. I also tried using 7.x-1.x-dev, but had the same result. However, I found that if I didn't set this as a block, but installed used the Context module to have the Site Activity block appear on a certain page, there was no error and the stream appeared as it should. I hope this is helpful - let me know if there's any more information I can provide for troubleshooting. • or to post comments.

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This only happens when you use heartbeat as a drupal block. I have multiple heartbeat stream blocks.

This only seems to happen to the one that I use on the user profile page. I've had this happen to me about 4 times in the span of a month. Luckily these were on a local dev site. I was able to reload the database. I later found out that the issue occurs when drupal calls cache_set to cache the heartbeat block. A quick solution is to disable block caching. However on my production site, I'm not able to disable block cache because I have a few other modules that depends on it.

So now I'm worried that this might one day suddenly stop working when the issue pops up. I'll have to look into the issue again when I get some more time.

BTW, I tried multiple versions of heartbeat. The issue still occurs • or to post comments. Download Dcs World 2 there.