XenForo server error

[mc nabulsy]

hello,

i just need to know how to solve this server error like what should i edit or what should i do

• ErrorException: Template error: [E_USER_WARNING] Macro publicost_macrosost is unknown
• src/XF/Template/Templater.php:660

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#0 [internal function]: XF\Template\Templater->handleTemplateError(512, '[E_USER_WARNING...', '/home/ii8dxkor/...', 660, Array)
#1 src/XF/Template/Templater.php(660): trigger_error('Macro publico...', 512)
#2 src/XF/Template/Templater.php(773)...
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