syntax error, unexpected identifier "btn"

#0 /home/bitrix/www/local/components/nv/publications/templates/www/one_pub.php(121): Bitrix\Main\Loader::autoLoad()
#1 /home/bitrix/www/bitrix/modules/main/classes/general/component_template.php(846): include('...')
#2 /home/bitrix/www/bitrix/modules/main/classes/general/component_template.php(955): CBitrixComponentTemplate->__IncludePHPTemplate()
#3 /home/bitrix/www/bitrix/modules/main/classes/general/component.php(791): CBitrixComponentTemplate->IncludeTemplate()
#4 /home/bitrix/www/bitrix/modules/main/classes/general/component.php(731): CBitrixComponent->showComponentTemplate()
#5 /home/bitrix/www/local/components/nv/publications/class.php(1280): CBitrixComponent->includeComponentTemplate()
#6 /home/bitrix/www/bitrix/modules/main/classes/general/component.php(675): PublicationsComponent->executeComponent()
#7 /home/bitrix/www/bitrix/modules/main/classes/general/main.php(1197): CBitrixComponent->includeComponent()
#8 /home/bitrix/www/inf/obs/os_okruk/ukuseful/index.php(11): CMain->IncludeComponent()
#9 {main}