Error Plugin Matomo after backup

Hello,
after try to do a test with an backup on a subdomain, following error is showing on admin-site: Class “ITCS\Plugin\System\ItcsMatomo\Extension\ItcsMatomo” not found

made the backup with akeeba. coud you tell me, whats happend with matemo extension?
thanks
sven

Hi @galaxyaner1
It looks like your issue comes from ITCS. What is it?