Hello and welcome to our forums,
Thank you for bringing the issue to our attention.
I've been able to reproduce it. It seems to be generated by the Enhanced User Interface option from the Themes page.
I have forwarded this to our development team and this will be fixed in a future version of Advanced Installer. As soon as the fix will be released we will notify you.
We understand the impact it has on your experience, and we are committed to delivering a resolution as quickly as possible.
We apologize for the inconvenience and appreciate your patience.
Liviu Sandu - Advanced Installer Team
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