Fatal error: Uncaught ValueError: Unknown format specifier "i" in /volume1/web/sspks/vendor/mustache/mustache/src/Mustache/Engine.php on line 598

ValueError: Unknown format specifier "i" in /volume1/web/sspks/vendor/mustache/mustache/src/Mustache/Engine.php on line 598

Call Stack:
    0.0001     463504   1. {main}() /volume1/web/sspks/index.php:0
    0.0382     572416   2. SSpkS\Handler->handle() /volume1/web/sspks/index.php:19
    0.0569     573552   3. SSpkS\Handler\BrowserDeviceListHandler->handle() /volume1/web/sspks/lib/SSpkS/Handler.php:34
    0.1044     655992   4. SSpkS\Output\HtmlOutput->output() /volume1/web/sspks/lib/SSpkS/Handler/BrowserDeviceListHandler.php:38
    0.1044     655992   5. Mustache_Engine->loadTemplate($name = 'html_modellist') /volume1/web/sspks/lib/SSpkS/Output/HtmlOutput.php:57
    0.1048     656752   6. Mustache_Engine->loadSource($source = '{{> html_head }}\r\n<div class="mdl-grid">\r\n{{# modellist }}\r\n    <div class="mdl-cell mdl-cell--2-col mdl-card small-card clickable-card mdl-shadow--2dp" onclick="location.href=\'?arch={{ arch }}\';">\r\n        <div class="mdl-card__title">\r\n            {{ name }}\r\n        </div>\r\n    </div>\r\n{{/ modellist }}\r\n</div>\r\n{{> html_tail }}\r\n', $cache = ???) /volume1/web/sspks/vendor/mustache/mustache/src/Mustache/Engine.php:619
    0.1048     656752   7. Mustache_Engine->getTemplateClassName($source = '{{> html_head }}\r\n<div class="mdl-grid">\r\n{{# modellist }}\r\n    <div class="mdl-cell mdl-cell--2-col mdl-card small-card clickable-card mdl-shadow--2dp" onclick="location.href=\'?arch={{ arch }}\';">\r\n        <div class="mdl-card__title">\r\n            {{ name }}\r\n        </div>\r\n    </div>\r\n{{/ modellist }}\r\n</div>\r\n{{> html_tail }}\r\n') /volume1/web/sspks/vendor/mustache/mustache/src/Mustache/Engine.php:691
    0.1048     656752   8. sprintf($format = 'version:%s,escape:%s,entity_flags:%i,charset:%s,strict_callables:%s,pragmas:%s,source:%s', $values = '2.11.1', 'default', 2, 'utf-8', 'false', '', '{{> html_head }}\r\n<div class="mdl-grid">\r\n{{# modellist }}\r\n    <div class="mdl-cell mdl-cell--2-col mdl-card small-card clickable-card mdl-shadow--2dp" onclick="location.href=\'?arch={{ arch }}\';">\r\n        <div class="mdl-card__title">\r\n            {{ name }}\r\n        </div>\r\n    </div>\r\n{{/ modellist }}\r\n</div>\r\n{{> html_tail }}\r\n') /volume1/web/sspks/vendor/mustache/mustache/src/Mustache/Engine.php:598