# Clear installation on Ubuntu server 18.04, theme preview blank

**URL:** <https://forum.mautic.org/t/clear-installation-on-ubuntu-server-18-04-theme-preview-blank/14284>\
**Category:** Product Support\
**Created:** [May 11, 2020, 7:38pm UTC](https://forum.mautic.org/t/clear-installation-on-ubuntu-server-18-04-theme-preview-blank/14284 "2020-05-11T19:38:40Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![masterale](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/masterale/32/433_2.png) [@masterale](https://forum.mautic.org/u/masterale)\
**Post date:** [May 11, 2020, 7:38pm UTC](https://forum.mautic.org/t/clear-installation-on-ubuntu-server-18-04-theme-preview-blank/14284/1 "2020-05-11T19:38:40Z")

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**Your software**  
My Mautic version is:2.16.2  
My PHP version is: 7.2.24

**Your problem**  
My problem is:Installation worked fine, with no problem. After first login when i go on Components, Landing Pages, i see list of all theme, but dont show any image. If i try to use Preview on 1 theme, i see a blank page.

These errors are showing in the log:No error, except one, but think no correlation on this problem :

- 

> [2020-05-11 14:46:04] mautic.ERROR: SCHEMA ERROR: An exception occurred while executing ‘SELECT f.alias, f.is\_unique\_identifer as is\_unique, f.type, f.object FROM lead\_fields f WHERE f.object = ‘lead’ ORDER BY f.field\_order ASC’: SQLSTATE[42S02]: Base table or view not found: 1146 Table ‘mautic.lead\_fields’ doesn’t exist \*

Steps I have tried to fix the problem:verify auth and owner path **/var/www/mautic/themes** , is the same on all folder: **drwxr-xr-x www-data www-data**.  
Obviously, button Builder dont work.