NTS Kay and Kunena 5.2.14 - error reporting

Hello,
after downloading and installing the latest NTS Kay template (in the administration it is visible as version 5.5.4) the server reports an error several times. If I use Kunena's Crypsisb3 template - no errors.

Joomla 3.10.11
Kunena 5.2.14

Error reporting:

( ! )  Notice: Trying to access array offset on value of type bool in .../libraries/vendor/leafo/lessphp/lessc.inc.php on line 665

part of the report

10	0.1635	6022480	KunenaTemplateNts_kay->initialize( )	.../display.php:241
11	0.1660	6033792	KunenaTemplateNts_kay->compileLess( $inputFile = 'assets/less/nts_kay.less', $outputFile = 'kunena.css' )	.../template.php:96
12	0.1671	6038048	lessc->cachedCompile( $in = '/.../components/com_kunena/template/nts_kay/assets/less/nts_kay.less', $force = ??? )	.../template.php:1787
13	0.1671	6038424	lessc->compileFile( $fname = '/.../components/com_kunena/template/nts_kay/assets/less/nts_kay.less', $outFname = ??? )	.../lessc.inc.php:2102
14	0.1672	6041176	lessc->compile( $string = '@charset "utf-8";\r\n/**\r\n* Kunena Template\r\n* @package Kunena.Template.NTSKay\r\n*\r\n* @copyright (C) 2009 - 2019 Nice Theme Store Team. All rights reserved.\r\n* @license https://9themestore.com\r\n* @link https://www.9themestore.com\r\n**/\r\n\r\n/*\r\n * All url()\'s should be relative paths from media folder inside the template or \'JROOT/media/kunena\'.\r\n * Less parser will automatically search for all the files from the lookup paths and use the first match.\r\n */\r\n:root {\r\n\t--border-colo', $name = '/.../components/com_kunena/template/nts_kay/assets/less/nts_kay.less' )	.../lessc.inc.php:2030

Attached screenshot of part of the report.

Hi ciklon,

Thank you so much for the bug report. We will check this issue and update template soon.

Update: I tried to check on Joomla 3.10.11 and Kunena 5.2.14 on PHP8 but do not see the warning as you. Please send the error link to me, I'll try to check this issue.

Best regards,