Syntax issue in wpml-config.xml

First of all, many thanks for developing this amazing theme!

We recently installed the Nanospace theme and the Polylang plug-in to support multi-languages. However, our website gives the following errors:

[Wed Aug 19 11:42:02.875750 2020] [php7:warn] [pid 40280] [client 10.6.212.12:52904] PHP Warning:  simplexml_load_file(): /instances/home/nexuse/htdocs/wp-content/themes/nanospace/wpml-config.xml:29: parser error : Comment not terminated in /instances/home/nexuse/htdocs/wp-content/plugins/polylang/modules/wpml/wpml-config.php on line 59, referer: https://nexus-e.org/wp-admin/plugins.php
[Wed Aug 19 11:42:02.875760 2020] [php7:warn] [pid 40280] [client 10.6.212.12:52904] PHP Warning:  simplexml_load_file(): /instances/home/nexuse/htdocs/wp-content/themes/nanospace/wpml-config.xml:29: parser error : Start tag expected, '<' not found in /instances/home/nexuse/htdocs/wp-content/plugins/polylang/modules/wpml/wpml-config.php on line 59, referer: https://nexus-e.org/wp-admin/plugins.php

As far as I understand, it means that the Polylang plug-in calls the wpml-config.xml of the Nanospace theme, but the wpml-config.xml has syntax problems.

The wpml-config.xml looks like the following:

<!-- WPML plugin setup                                     -->
<!--                                                       -->
<!-- Adding Customizer fields for plugin to localize them. -->
<!--                                                       -->
<!-- @package    NanoSpace                                 -->
<!-- @copyright  Labinator                                 -->
<!--                                                       -->
<!-- @since 1.0.0
<!-- @version 1.0.0

<wpml-config>

	<admin-texts>
		<key name="theme_mods_nanospace">
			<key name="texts_site_info" />
		</key>
	</admin-texts>

	<custom-fields>
		<custom-field action="copy">show_intro_widgets</custom-field>
		<custom-field action="copy">no_intro</custom-field>
		<custom-field action="copy">no_intro_media</custom-field>
		<custom-field action="copy">no_thumbnail</custom-field>
		<custom-field action="copy">content_layout</custom-field>
		<custom-field action="copy">intro_image</custom-field>
	</custom-fields>

</wpml-config>

The last comment is indeed not closed and it is already like this since version 1.0.0 according to https://themes.svn.ww.wp.xz.cn/nanospace/.

How should this be solved?
Also, we rencently noticed a memory leak issue of the website, could this syntax issue be the cause?

Thank you very much in advance for the help!

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