Hello Ante Vodanović,
Thank you for reaching out to our technical support forum. I’m sorry to hear about the trouble you’re experiencing. Rest assured, I will look into this issue for you and work to resolve it as quickly as possible.
I have checked the Rental template with latest SP Page Builder and Joomla version. There are no issues with the Rental Feature addon. Please share your administrator access here to check the issue. Use the Hidden Content box to share the credentials. Make sure that you have a full site backup before sharing.
Best regards