Hello everyone,

I'm currently encountering issues with theme utilization in Odoo 16 Community standalone installation.

I follow the recommendations provided in articles and forum posts when installing themes. (All new custom themes and addons are placed within the /opt/odoo/odoo-server/custom-addons directory.)

After downloading and installing several themes, I've observed that most of them fail to function correctly. They struggle to implement changes, and the saving process seems to take an indefinite amount of time.

Below, please find a screenshot showcasing an issue with the "Blast theme".

Upon adding a feature snippet, it completely disables the ability to add any other structural elements from the list. Furthermore, when attempting to save this added change, the Save button continues to run endlessly without producing any results or implementing any modifications.

Switching back to the default theme resolves all issues, and both structural and color changes function correctly. 

I am monitoring the log file and do not observe any errors in the 

tail -f /var/log/odoo/odoo-server.log file.
The only error i found on frontend side is the following:

 Could you kindly provide guidance on addressing these theming issues? Are there any specific server-side permissions that need to be modified, or are there JavaScript-related problems that should be addressed? 
Thanks in advance!