Here is a short list of things that may fix this issue:
Please check the response using a different browser.
Clear the browser cache.
Try re-publishing the workbook.
Is IE in “compatibility mode”?
Have you rebuilt the search index in Tableau Server? (Rebuild the Search Index)
Thanks for giving these a try. If one of these processes resolves the issue, please let me know. If not you may need to file a case with Tableau Support.
We had tried everything on your list but the rebuild index. I just tried that but still no thumbs. We are seeing this across all browsers and devices so it must be a thumb generation problem.
I think the problem is based on my published data source having the user filter in it. And my workbooks with missing thumbs use the published data source, but have no user filters of their own.
I've opened a case and have submitted log files so hopefully they will find something. This worked in the past.
I have an update to share from Tableau Support.
It looks like, that starting at 9.1, you will not get thumbs no matter what you do if you have a user filter in your published data source. I can't understand why I can't specify that I want thumbs. We are going to miss them....
The suggestion was to move the user filters out of the data source and into each workbook - which adds to maintenance. I've included my reply from support below. Even though I was not happy at all with the outcome, the support I received was very good.
I have some interesting news regarding this case. After
teaming up with our developers and senior engineers, it turns out this is
expected behavior as of version 9.1 and later. You will not see view/workbook
thumbnails if you are connected to a published data source that has a user
filter as part of the published data source. This was an intentional feature
added because it was decided as a security issue where users were able to see
data they were not supposed to.
This makes more sense to me as it seemed to be a very
strange issue as nothing else seemed to be affected and we were able to see and
interact with data as expected. Nonetheless, I wanted to inform you about this
added feature and why it started occurring once upgraded to 9.1 and later.
I hope this proves useful and I believe the above
information will answer the question. We may send a survey to confirm that the
case has been fully resolved. We appreciate any feedback on this case as well
as the general Tableau Technical Support experience.
We also have been hit by this problem as a result of recently upgrading.
We deliberately included data filters in the published data source because
- we have multiple workbooks using the data source, so it makes sense to keep the filter in one place
- as we start rolling out desktop to some users, we want them to be able to use the published data source with the security filter in place.
I can sort of understand why Tableau have done this, but I don't think they have adequately thought through the consequences. The problem lies around a person with restricted access to data (ie as defined by a data filter in a published data source) being able to use Desktop to publish a workbook using that data source. I'll have to think a bit more about the implications of that.
As for workarounds, the only one I can see for us is to remove the "data source filter" from the published data source and add a "data source filter" to the workbooks that consume that data. This is a workable solution only if we don't roll Desktop out to users who have a restricted view of the data (which is probably a safe assumption at the moment).
I have tested this and it seems to work. Just make sure that when you open Desktop to add the data source filter to the workbook that you are using a user that can see all the data, otherwise strange things happen with the data source filter.
We run into this problem with some frequency too, but with Tableau Online. It doesn't seem to be a permission thing or a user profile issue for us though - sometimes it works, sometimes not. Some workbooks will only have one dashboard not load a thumbnail, but the rest are fine. No rhyme or reason, and the only thing that has seemed to work has been to just keep republishing until it correctly loads all of the thumbnails. Pretty frustrating, to be honest.
I run into the similar issue. Some of the dashboard published on tableau online does not render the thumbnail. Republishing them again will brings the preview back to the dashboard. No defined patter for the issue, it happening randomly . I am on Tableau Desktop 10.5.0 with Tableau online.
I'm curious where did you get the TD version 10.5.1 ? ;-)
It's a typo . My server versión is 10.4.1, Desktop -> 10.5