[Plugin: Quick Cache ( Speed Without Compromise )] HELP, weird text/code above the blog pages,HOW TO

(plugin version 111203)
I am going mad because of all the mess with so much plugins that ‘don’t like each other’ ??
I dropped also W3 Total Cache for Quick Cache and the start was more than good : page load time went down for more than 50% . But the joy was a short-time-alive. After a few fast page loads, at the top of the web page, above my normal dashboard, suddenly appeared the following text in 8-rows :
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siteurl = https://domainname.info
blogurl =
home = https://domainname.info
replace rootpath: /home/allisa1/public_html/domainname.info/ with site url: https://domainname.info/ in plugin path: /home/allisa1/public_html/domainname.info/wp-content/plugins/strictly-google-sitemap/
plugin url is https://domainname.info/wp-content/plugins/strictly-google-sitemap/
IN GetOptions
sitemap_file_count = 1
pluginpath: /home/allisa1/public_html/domainname.info/wp-content/plugins/strictly-google-sitemap/rootpath: /home/allisa1/public_html/domainname.info/plugin url: https://domainname.info/wp-content/plugins/strictly-google-sitemap/xslurl: https://domainname.info/wp-content/plugins/strictly-google-sitemap/sitemap.xslsitemap fullpath: /home/allisa1/public_html/domainname.info/sitemap.xml
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NOTE: real domain name is replaced with ‘domainname.info’
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The text shown above pushes the normal dashboard page down, but it’s not the worst thing that happens :
IT ALSO SHOWS UP ON BLOG and pushes the blog pages down the same way.
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This is 100% for sure the result of the Quick Cache plugin (it was the only new plugin I installed ) but I do not have idea where actually those lines are written up , which file(s) I need to look at and how to fix this.
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I removed Quick Cache, cleared cache from browser, but the text remains
there.
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PLEASE if anyone can help me I would be very grateful

https://www.ads-software.com/extend/plugins/quick-cache/