PHP fatal error Class 'OvicLayoutControl' not found

Hello,
I have a fresh install of prestahop 1.6.1.23
I installed your theme "boutique" and activated it but I get an error 500 directly

Could you please help ?

in apache2 log:
[Fri Mar 08 18:05:06.966934 2019] [:error] [pid 23318] [client 106.38.241.120:37469] PHP Fatal error: Uncaught Error: Class 'OvicLayoutControl' not found in /home/charly/albertocabale.com/tools/smarty/sysplugins/smarty_internal_templatebase.php(157) : eval()'d code:134\nStack trace:\n#0 /home/charly/albertocabale.com/tools/smarty/sysplugins/smarty_internal_templatebase.php(188): content_5c82aed2ebdfb9_72594508(Object(Smarty_Custom_Template))\n#1 /home/charly/albertocabale.com/classes/SmartyCustom.php(317): Smarty_Internal_TemplateBase->fetch(Object(Smarty_Custom_Template), NULL, NULL, NULL, false, false, true)\n#2 /home/charly/albertocabale.com/tools/smarty/sysplugins/smarty_internal_template.php(303): Smarty_Custom_Template->fetch(NULL, NULL, NULL, NULL, false, false, true)\n#3 /home/charly/albertocabale.com/tools/smarty/sysplugins/smarty_internal_templatebase.php(157) : eval()'d code(38): Smarty_Internal_Template->getSubTemplate('/home/charly/al...', NULL, NULL, 0, NULL, Array, 0)\n#4 /home/charly/albertocabale.com/tools/smarty/sysplugins/smarty_internal_templatebase.php(188): content_5c82aed2e32539_51495315(Obje in /home/charly/albertocabale.com/tools/smarty/sysplugins/smarty_internal_templatebase.php(157) : eval()'d code on line 134