# How to debug the "new" block thumbnails

**URL:** <https://forum.litium.com/t/how-to-debug-the-new-block-thumbnails/1931>\
**Category:** Questions\
**Created:** [March 10, 2021, 2:59pm UTC](https://forum.litium.com/t/how-to-debug-the-new-block-thumbnails/1931 "2021-03-10T14:59:40Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![NilsN](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.litium.com/nilsn/32/302_2.png) [@NilsN](https://forum.litium.com/u/NilsN)\
**Post date:** [March 12, 2021, 9:48am UTC](https://forum.litium.com/t/how-to-debug-the-new-block-thumbnails/1931/13 "2021-03-12T09:48:23Z")

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Are there any restrictions on the new back office domain? Like it’s only accessible from certain IP addresses. In another case when the thumbnail wasn’t being generated it was because the IP of the server itself wasn’t whitelisted.

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